start-ver=1.4
cd-journal=joma
no-vol=1807
cd-vols=
no-issue=3
article-no=
start-page=319
end-page=325
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2011
dt-pub=201103
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Roles of PsbI and PsbM in photosystem II dimer formation and stability studied by deletion mutagenesis and X-ray crystallography
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=PsbM and PsbI are two low molecular weight subunits of photosystem II (PSII), with PsbM being located in the center, and PsbI in the periphery, of the PSII dimer. In order to study the functions of these two subunits from a structural point of view, we crystallized and analyzed the crystal structure of PSII dimers from two mutants lacking either PsbM or PsbI. Our results confirmed the location of these two subunits in the current crystal structure, as well as their absence in the respective mutants. The relative contents of PSII dimers were found to be decreased in both mutants, with a concomitant increase in the amount of PSII monomers, suggesting a destabilization of PSII dimers in both of the mutants. On the other hand, the accumulation level of the overall PSII complexes in the two mutants was similar to that in the wild-type strain. Treatment of purified PSII dimers with lauryldimethylamine N-oxide at an elevated temperature preferentially disintegrated the dimers from the PsbM deletion mutant into monomers and CP43-less monomers, whereas no significant degradation of the dimers was observed from the PsbI deletion mutant. These results indicate that although both PsbM and PsbI are required for the efficient formation and stability of PSII dimers in vivo, they have different roles, namely, PsbM is required directly for the formation of dimers and its absence led to the instability of the dimers accumulated. On the other hand, PsbI is required in the assembly process of PSII dimers in vivo; once the dimers are formed, PsbI was no longer required for its stability.
en-copyright=
kn-copyright=
en-aut-name=KawakamiKeisuke
en-aut-sei=Kawakami
en-aut-mei=Keisuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=UmenaYasufumi
en-aut-sei=Umena
en-aut-mei=Yasufumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=IwaiMasako
en-aut-sei=Iwai
en-aut-mei=Masako
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=KawabataYousuke
en-aut-sei=Kawabata
en-aut-mei=Yousuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=IkeuchiMasahiko
en-aut-sei=Ikeuchi
en-aut-mei=Masahiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=KamiyaNobuo
en-aut-sei=Kamiya
en-aut-mei=Nobuo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=ShenJian-Ren
en-aut-sei=Shen
en-aut-mei=Jian-Ren
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
affil-num=1
en-affil=
kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology/Faculty of Science, Okayama University
affil-num=2
en-affil=
kn-affil=Department of Chemistry, Graduate School of Science, Osaka City University
affil-num=3
en-affil=
kn-affil=Department of Applied Biological Science, Faculty of Science and Technology, Tokyo University of Science
affil-num=4
en-affil=
kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology/Faculty of Science, Okayama University
affil-num=5
en-affil=
kn-affil=Department of Life Sciences (Biology), Graduate School of Arts and Science, The University of Tokyo
affil-num=6
en-affil=
kn-affil=Department of Chemistry, Graduate School of Science, Osaka City University
affil-num=7
en-affil=
kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology/Faculty of Science, Okayama University
en-keyword=Photosystem II
kn-keyword=Photosystem II
en-keyword=Mutant
kn-keyword=Mutant
en-keyword=Crystal structure
kn-keyword=Crystal structure
en-keyword=PsbM
kn-keyword=PsbM
en-keyword=PsbI
kn-keyword=PsbI
en-keyword=Oxygen evolution
kn-keyword=Oxygen evolution
END
start-ver=1.4
cd-journal=joma
no-vol=104
cd-vols=
no-issue=1-2
article-no=
start-page=9
end-page=18
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2011
dt-pub=2011
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Structure of the catalytic, inorganic core of oxygen-evolving photosystem II at 1.9 ? resolution
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The catalytic center for photosynthetic water-splitting consists of 4 Mn atoms and 1 Ca atom and is located near the lumenal surface of photosystem II. So far the structure of the Mn(4)Ca-cluster has been studied by a variety of techniques including X-ray spectroscopy and diffraction, and various structural models have been proposed. However, its exact structure is still unknown due to the limited resolution of crystal structures of PSII achieved so far, as well as possible radiation damages that might have occurred. Very recently, we have succeeded in solving the structure of photosystem II at 1.9 angstrom. which yielded a detailed picture of the Mn(4)CaO(5)-cluster for the first time. In the high resolution structure, the Mn(4)CaO(5)-cluster is arranged in a distorted chair form, with a cubane-like structure formed by 3 Mn and 1 Ca, 4 oxygen atoms as the distorted base of the chair, and 1 Mn and 1 oxygen atom outside of the cubane as the back of the chair. In addition, four water molecules were associated with the cluster, among which, two are associated with the terminal Mn atom and two are associated with the Ca atom. Some of these water molecules may therefore serve as the substrates for water-splitting. The high resolution structure of the catalytic center provided a solid basis for elucidation of the mechanism of photosynthetic water splitting. We review here the structural features of the Mn(4)CaO(5)-cluster analyzed at 1.9 angstrom resolution, and compare them with the structures reported previously.
en-copyright=
kn-copyright=
en-aut-name=KawakamiKeisuke
en-aut-sei=Kawakami
en-aut-mei=Keisuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=UmenaYasufumi
en-aut-sei=Umena
en-aut-mei=Yasufumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=KamiyaNobuo
en-aut-sei=Kamiya
en-aut-mei=Nobuo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=ShenJian-Ren
en-aut-sei=Shen
en-aut-mei=Jian-Ren
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
affil-num=1
en-affil=
kn-affil=Department of Chemistry, Graduate School of Science, and The OCU Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University
affil-num=2
en-affil=
kn-affil=Department of Chemistry, Graduate School of Science, and The OCU Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University
affil-num=3
en-affil=
kn-affil=Department of Chemistry, Graduate School of Science, and The OCU Advanced Research Institute for Natural Science and Technology (OCARINA), Osaka City University
affil-num=4
en-affil=
kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology/Faculty of Science, Okayama University
en-keyword=Crystal structure
kn-keyword=Crystal structure
en-keyword=Membrane protein structure
kn-keyword=Membrane protein structure
en-keyword=Oxygen-evolving complex
kn-keyword=Oxygen-evolving complex
en-keyword=Photosystem II
kn-keyword=Photosystem II
en-keyword=Water-oxidation
kn-keyword=Water-oxidation
END
start-ver=1.4
cd-journal=joma
no-vol=473
cd-vols=
no-issue=7345
article-no=
start-page=55
end-page=60
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2011
dt-pub=20110505
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Crystal structure of oxygen-evolving photosystem II at a resolution of 1.9??
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Photosystem II is the site of photosynthetic water oxidation and contains 20 subunits with a total molecular mass of 350 kDa. The structure of photosystem II has been reported at resolutions from 3.8 to 2.9 angstrom. These resolutions have provided much information on the arrangement of protein subunits and cofactors but are insufficient to reveal the detailed structure of the catalytic centre of water splitting. Here we report the crystal structure of photosystem II at a resolution of 1.9 angstrom. From our electron density map, we located all of the metal atoms of the Mn(4)CaO(5) cluster, together with all of their ligands. We found that five oxygen atoms served as oxo bridges linking the five metal atoms, and that four water molecules were bound to the Mn(4)CaO(5) cluster; some of them may therefore serve as substrates for dioxygen formation. We identified more than 1,300 water molecules in each photosystem II monomer. Some of them formed extensive hydrogen-bonding networks that may serve as channels for protons, water or oxygen molecules. The determination of the high-resolution structure of photosystem II will allow us to analyse and understand its functions in great detail.
en-copyright=
kn-copyright=
en-aut-name=UmenaYasufumi
en-aut-sei=Umena
en-aut-mei=Yasufumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=KawakamiKeisuke
en-aut-sei=Kawakami
en-aut-mei=Keisuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=ShenJian-Ren
en-aut-sei=Shen
en-aut-mei=Jian-Ren
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=KamiyaNobuo
en-aut-sei=Kamiya
en-aut-mei=Nobuo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
affil-num=1
en-affil=
kn-affil=Department of Chemistry, Graduate School of Science, Osaka City University
affil-num=2
en-affil=
kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology/Faculty of Science; Okayama University
affil-num=3
en-affil=
kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology/Faculty of Science; Okayama University
affil-num=4
en-affil=
kn-affil=Department of Chemistry, Graduate School of Science, Osaka City University
END
start-ver=1.4
cd-journal=joma
no-vol=51
cd-vols=
no-issue=2
article-no=
start-page=306
end-page=308
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=20100113
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Palladium- and base-free synthesis of conjugated ynones by cross-coupling reactions of alkynylboronates with acid chlorides mediated by CuCl
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Alkynylboronates can be employed as a practical and versatile precursor for a variety of pi-conjugated organic compounds. In the presence of Cu(I) salt, cross-coupling reactions of acid chlorides with alkynylboronates giving rise to the corresponding conjugated ynones takes place readily in aprotic polar solvents such as DMI under neutral conditions.
en-copyright=
kn-copyright=
en-aut-name=NishiharaYasushi
en-aut-sei=Nishihara
en-aut-mei=Yasushi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=SaitoDaisuke
en-aut-sei=Saito
en-aut-mei=Daisuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=InoueEiji
en-aut-sei=Inoue
en-aut-mei=Eiji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=OkadaYoshiaki
en-aut-sei=Okada
en-aut-mei=Yoshiaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=MiyazakiMikihiro
en-aut-sei=Miyazaki
en-aut-mei=Mikihiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=InoueYoshiaki
en-aut-sei=Inoue
en-aut-mei=Yoshiaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=TakagiKentaro
en-aut-sei=Takagi
en-aut-mei=Kentaro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
affil-num=1
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
affil-num=4
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
affil-num=5
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
affil-num=6
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
affil-num=7
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
END
start-ver=1.4
cd-journal=joma
no-vol=102
cd-vols=
no-issue=3-4
article-no=
start-page=620
end-page=626
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2011
dt-pub=20110222
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Improvement in sulfur desorption of NOX storage and reduction catalysts using a Ba?Ti composite oxide
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=A Ba-Ti composite oxide was formed on a NOx storage and reduction catalyst via impregnation of a Ba-Ti precursor solution composed of H(2)O(2) added to a complex prepared using the citric acid method. The structure of the Ba-Ti composite in solution was analyzed by chemical composition analysis and FT-Raman and UV-vis spectroscopy. MM2 calculations were performed to propose its chemical structure. Both Ba and Ti together were found to form a composite molecule in the solution. Furthermore, TEM-EDX and XRD analyses of the Ba-Ti composite oxide on the catalyst prepared by impregnation with the Ba-Ti composite aqueous solution revealed that Ba and Ti in the catalyst were highly dispersed at the nm scale. The formation of the Ba-Ti composite oxide on the NSR catalyst enhanced sulfur desorption efficiency and led to high-performance NO(X) conversion as a NO(X) storage and reduction activity catalyst after desulfation treatment. It was assumed that the existence of nano-scaled Ba compounds combined with Ti was efficient for the inhibition of the sintering of barium sulfate and its facile decomposition. It was found that dispersion of Ba compounds for NO(X) storage materials using a Ba-Ti complex solution is an efficient way to improve the durability of NSR catalysts.
en-copyright=
kn-copyright=
en-aut-name=TanakaToshiyuki
en-aut-sei=Tanaka
en-aut-mei=Toshiyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=TajimaIchirou
en-aut-sei=Tajima
en-aut-mei=Ichirou
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=KatoYuichi
en-aut-sei=Kato
en-aut-mei=Yuichi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=NishiharaYasushi
en-aut-sei=Nishihara
en-aut-mei=Yasushi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=ShinjohHirofumi
en-aut-sei=Shinjoh
en-aut-mei=Hirofumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
affil-num=1
en-affil=
kn-affil=Toyota Central Research and Development Labs., Inc.
affil-num=2
en-affil=
kn-affil=Toyota Central Research and Development Labs., Inc.
affil-num=3
en-affil=
kn-affil=Toyota Central Research and Development Labs., Inc.
affil-num=4
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
affil-num=5
en-affil=
kn-affil=Toyota Central Research and Development Labs., Inc.
END
start-ver=1.4
cd-journal=joma
no-vol=16
cd-vols=
no-issue=10
article-no=
start-page=8815
end-page=8832
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2011
dt-pub=20111020
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Studies on the Synthesis of DMAP Derivatives by Diastereoselective Ugi Reactions
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Diastereoselective Ugi reactions of DMAP-based aldehydes with ƒ¿-amino acids and tert-butyl isocyanide were examined. The reactions of 4-(dimethylamino)-2-pyridine-carboxaldehyde with various ƒ¿-amino acids afforded 2-substituted DMAP derivatives with low diastereoselectivity. On the contrary, reactions with 4-(dimethylamino)-3-pyridine-carboxaldehyde delivered 3-substituted DMAP derivatives with moderate to high diastereoselectivity. The combination of ƒ¿-amino acid and DMAP-based aldehyde is thus important to achieve high diastereoselectivity. Kinetic resolution of a secondary alcohol using a chiral DMAP derivative obtained through these reactions was also examined.
en-copyright=
kn-copyright=
en-aut-name=MandaiHiroki
en-aut-sei=Mandai
en-aut-mei=Hiroki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=IrieShunsuke
en-aut-sei=Irie
en-aut-mei=Shunsuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=MitsudoKoichi
en-aut-sei=Mitsudo
en-aut-mei=Koichi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=SugaSeiji
en-aut-sei=Suga
en-aut-mei=Seiji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
affil-num=1
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
affil-num=4
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
en-keyword=multicomponent reaction
kn-keyword=multicomponent reaction
en-keyword=Ugi reaction
kn-keyword=Ugi reaction
en-keyword=chiral DMAP
kn-keyword=chiral DMAP
en-keyword=kinetic resolution
kn-keyword=kinetic resolution
END
start-ver=1.4
cd-journal=joma
no-vol=46
cd-vols=
no-issue=48
article-no=
start-page=9256
end-page=9258
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=2010
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Electrochemical generation of silver acetylides from terminal alkynes with a Ag anode and integration into sequential Pd-catalysed coupling with arylboronic acids
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=An electro-oxidative method for generating silver acetylides from acetylenes with a Ag anode was developed. The reaction could be integrated into a Pd-catalysed electrochemical Sonogashira-type reaction. In the presence of the catalytic amount of Pd(OAc)(2) and 4-BzO-TEMPO, electro-generated silver acetylides reacted immediately with arylboronic acids to afford the corresponding coupling adducts in high yields.
en-copyright=
kn-copyright=
en-aut-name=MitsudoKoichi
en-aut-sei=Mitsudo
en-aut-mei=Koichi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=ShiragaTakuya
en-aut-sei=Shiraga
en-aut-mei=Takuya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=MizukawaJun-ichi
en-aut-sei=Mizukawa
en-aut-mei=Jun-ichi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=SugaSeiji
en-aut-sei=Suga
en-aut-mei=Seiji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=TanakaHideo
en-aut-sei=Tanaka
en-aut-mei=Hideo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
affil-num=1
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
affil-num=4
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
affil-num=5
en-affil=
kn-affil=Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
END
start-ver=1.4
cd-journal=joma
no-vol=13
cd-vols=
no-issue=
article-no=
start-page=373
end-page=389
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=2010
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Mechanisms of Acido-Tolerance and Characteristics of Photosystems in an Acidophilic and Thermophilic Red Alga, Cyanidium Caldarium
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=In this chapter, we describe the mechanisms of acido-tolerance in an acidophilic- and thermophilic red alga, Cyanidium caldarium. In spite of the extremely acidic environments it inhabits, the intracellular pH of Cyanidium cells is kept neutral by pumping out the protons previously leaked into the cells according to the steep pH gradient. The H+ pump is driven by the plasma membrane ATPase, utilizing intracellular ATP produced by both oxidative phosphorylation and cyclic photophosphorylation via photosystem I. We also describe the characteristics and function of the two photosystems, Photosystem I (PSI) and II (PSII), in Cyanidium caldarium in comparison with those of cyanobacteria, other eukaryotic algae, and higher plants, based on the crystal structures of the two complexes reported so far.
en-copyright=
kn-copyright=
en-aut-name=EnamiIsao
en-aut-sei=Enami
en-aut-mei=Isao
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=AdachiHideyuki
en-aut-sei=Adachi
en-aut-mei=Hideyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=ShenJian-Ren
en-aut-sei=Shen
en-aut-mei=Jian-Ren
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
affil-num=1
en-affil=
kn-affil=Department of Biology, Faculty of Science, Tokyo University of Science
affil-num=2
en-affil=
kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology, Okayama University
END
start-ver=1.4
cd-journal=joma
no-vol=285
cd-vols=
no-issue=38
article-no=
start-page=29191
end-page=29199
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=20100917
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Binding and Functional Properties of Five Extrinsic Proteins in Oxygen-evolving Photosystem II from a Marine Centric Diatom, Chaetoceros gracilis
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Oxygen-evolving photosystem II (PSII) isolated from a marine centric diatom, Chaetoceros gracilis, contains a novel extrinsic protein (Psb31) in addition to four red algal type extrinsic proteins of PsbO, PsbQŒ, PsbV, and PsbU. In this study, the five extrinsic proteins were purified from alkaline Tris extracts of the diatom PSII by anion and cation exchange chromatographic columns at different pH values. Reconstitution experiments in various combinations with the purified extrinsic proteins showed that PsbO, PsbQŒ, and Psb31 rebound directly to PSII in the absence of other extrinsic proteins, indicating that these extrinsic proteins have their own binding sites in PSII intrinsic proteins. On the other hand, PsbV and PsbU scarcely rebound to PSII alone, and their effective bindings required the presence of all of the other extrinsic proteins. Interestingly, PSII reconstituted with Psb31 alone considerably restored the oxygen evolving activity in the absence of PsbO, indicating that Psb31 serves as a substitute in part for PsbO in supporting oxygen evolution. A significant difference found between PSIIs reconstituted with Psb31 and with PsbO is that the oxygen evolving activity of the former is scarcely stimulated by Cl? and Ca2+ ions but that of the latter is largely stimulated by these ions, although rebinding of PsbV and PsbU activated oxygen evolution in the absence of Cl? and Ca2+ ions in both the former and latter PSIIs. Based on these results, we proposed a model for the association of the five extrinsic proteins with intrinsic proteins in diatom PSII and compared it with those in PSIIs from the other organisms.
en-copyright=
kn-copyright=
en-aut-name=NagaoRyo
en-aut-sei=Nagao
en-aut-mei=Ryo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=MoriguchiAkira
en-aut-sei=Moriguchi
en-aut-mei=Akira
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=TomoTatsuya
en-aut-sei=Tomo
en-aut-mei=Tatsuya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=NiikuraAyako
en-aut-sei=Niikura
en-aut-mei=Ayako
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=NakajimaSaori
en-aut-sei=Nakajima
en-aut-mei=Saori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=SuzukiTakehiro
en-aut-sei=Suzuki
en-aut-mei=Takehiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=OkumuraAkinori
en-aut-sei=Okumura
en-aut-mei=Akinori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=IwaiMasako
en-aut-sei=Iwai
en-aut-mei=Masako
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
en-aut-name=ShenJian-Ren
en-aut-sei=Shen
en-aut-mei=Jian-Ren
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=
en-aut-name=IkeuchiMasahiko
en-aut-sei=Ikeuchi
en-aut-mei=Masahiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=
en-aut-name=EnamiIsao
en-aut-sei=Enami
en-aut-mei=Isao
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=11
ORCID=
affil-num=1
en-affil=
kn-affil=Department of Life Sciences (Biology), Graduate School of Art and Sciences, University of Tokyo
affil-num=2
en-affil=
kn-affil=Department of Biology, Faculty of Science, Tokyo University of Science
affil-num=3
en-affil=
kn-affil=Department of Biology, Faculty of Science, Tokyo University of Science
affil-num=4
en-affil=
kn-affil=Division of Biosciences, Graduate School of Natural Science and Technology, Okayama University
affil-num=5
en-affil=
kn-affil=Department of Biology, Faculty of Science, Tokyo University of Science
affil-num=6
en-affil=
kn-affil=Biomolecular Characterization Team, Discovery Research Institute, RIKEN
affil-num=7
en-affil=
kn-affil=Department of Integrated Sciences in Physics and Biology, College of Humanities and Sciences, Nihon University
affil-num=8
en-affil=
kn-affil=Department of Life Sciences (Biology), Graduate School of Art and Sciences, University of Tokyo
affil-num=9
en-affil=
kn-affil=Division of Biosciences, Graduate School of Natural Science and Technology, Okayama University
affil-num=10
en-affil=
kn-affil=Department of Life Sciences (Biology), Graduate School of Art and Sciences, University of Tokyo
affil-num=11
en-affil=
kn-affil=Department of Biology, Faculty of Science, Tokyo University of Science
END
start-ver=1.4
cd-journal=joma
no-vol=684
cd-vols=
no-issue=
article-no=
start-page=41
end-page=51
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2011
dt-pub=2011
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Purification and Crystallization of Oxygen-Evolving Photosystem II Core Complex from Thermophilic Cyanobacteria
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=This chapter describes the purification and crystallization of oxygen-evolving photosystem II core dimer complex from a thermophilic cyanobacterium Thermosynechococcus vulcanus. Procedures used for purification of photosystem II from the cyanobacterium involves cultivation of cells, isolation of thylakoid membranes, purification of crude and pure photosystem II core complexes by detergent solubilization, followed by differential centrifugation and column chromatography. The purified core dimer particles were successfully used for crystallization, and the methods and conditions used for crystallization are presented. These purification and crystallization procedures can be applied for another thermophilic cyanobacterium T. elongatus.
en-copyright=
kn-copyright=
en-aut-name=ShenJian-Ren
en-aut-sei=Shen
en-aut-mei=Jian-Ren
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=KawakamiKeisuke
en-aut-sei=Kawakami
en-aut-mei=Keisuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=KoikeHiroyuki
en-aut-sei=Koike
en-aut-mei=Hiroyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
affil-num=1
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=Department of Biosciences, Faculty of Science and Engineering, Chuo University
en-keyword=Photosystem II
kn-keyword=Photosystem II
en-keyword=Oxygen evolution
kn-keyword=Oxygen evolution
en-keyword=Crystallization
kn-keyword=Crystallization
en-keyword=Membrane proteins
kn-keyword=Membrane proteins
en-keyword=Ion-exchange chromatography
kn-keyword=Ion-exchange chromatography
END
start-ver=1.4
cd-journal=joma
no-vol=1797
cd-vols=
no-issue=2
article-no=
start-page=278
end-page=284
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=201002
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Structural and functional studies on Ycf12 (Psb30) and PsbZ-deletion mutants from a thermophilic cyanobacterium
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Ycf12 (Psb30) and PsbZ are two low molecular weight subunits of photosystem II (PSII), with one and two trans-membrane helices, respectively. In order to study the functions of these two subunits from a structural point of view, we constructed deletion mutants lacking either Ycf12 or PsbZ from Thermosynechococcus elongatus, and purified, crystallized and analyzed the structure of PSII dimer from the two mutants. Our results showed that Ycf12 is located in the periphery of PSII, close to PsbK, PsbZ and PsbJ, and corresponded to the unassigned helix X1 reported previously, in agreement with the recent structure at 2.9 ? resolution (A. Guskov, J. Kern, A. Gabdulkhakov, M. Broser, A. Zouni, W. Saenger, Cyanobacterial photosystem II at 2.9 ? resolution: role of quinones, lipids, channels and chloride, Nat. Struct. Mol. Biol. 16 (2009) 334?342). On the other hand, crystals of PsbZ-deleted PSII showed a remarkably different unit cell constants from those of wild-type PSII, indicating a role of PsbZ in the interactions between PSII dimers within the crystal. This is the first example for a different arrangement of PSII dimers within the cyanobacterial PSII crystals. PSII dimers had a lower oxygen-evolving activity from both mutants than that from the wild type. In consistent with this, the relative content of PSII in the thylakoid membranes was lower in the two mutants than that in the wild type. These results suggested that deletion of both subunits affected the PSII activity, thereby destabilized PSII, leading to a decrease in the PSII content in vivo. While PsbZ was present in PSII purified from the Ycf12-deletion mutant, Ycf12 was present in crude PSII but absent in the finally purified PSII from the PsbZ-deletion mutant, indicating a preferential, stabilizing role of PsbZ for the binding of Ycf12 to PSII. These results were discussed in terms of the PSII crystal structure currently available
en-copyright=
kn-copyright=
en-aut-name=TakasakaKenji
en-aut-sei=Takasaka
en-aut-mei=Kenji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=IwaiMasako
en-aut-sei=Iwai
en-aut-mei=Masako
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=UmenaYasufumi
en-aut-sei=Umena
en-aut-mei=Yasufumi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=KawakamiKeisuke
en-aut-sei=Kawakami
en-aut-mei=Keisuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=OhmoriYukari
en-aut-sei=Ohmori
en-aut-mei=Yukari
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=IkeuchiMasahiko
en-aut-sei=Ikeuchi
en-aut-mei=Masahiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=TakahashiYuichiro
en-aut-sei=Takahashi
en-aut-mei=Yuichiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=KamiyaNobuo
en-aut-sei=Kamiya
en-aut-mei=Nobuo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
en-aut-name=ShenJian-Ren
en-aut-sei=Shen
en-aut-mei=Jian-Ren
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=
affil-num=1
en-affil=
kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology/Faculty of Science; Okayama University
affil-num=2
en-affil=
kn-affil=Department of Applied Biological Science, Faculty of Science and Technology, Tokyo University of Science
affil-num=3
en-affil=
kn-affil=Department of Chemistry, Graduate School of Science, Osaka City University
affil-num=4
en-affil=
kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology/Faculty of Science; Okayama University
affil-num=5
en-affil=
kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology/Faculty of Science; Okayama University
affil-num=6
en-affil=
kn-affil=Department of Life Sciences (Biology), Graduate School of Arts and Science, The University of Tokyo
affil-num=7
en-affil=
kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology/Faculty of Science; Okayama University
affil-num=8
en-affil=
kn-affil=Department of Chemistry, Graduate School of Science, Osaka City University
affil-num=9
en-affil=
kn-affil=Division of Bioscience, Graduate School of Natural Science and Technology/Faculty of Science; Okayama University
en-keyword=Photosystem II
kn-keyword=Photosystem II
en-keyword=Mutant
kn-keyword=Mutant
en-keyword=Crystal structure
kn-keyword=Crystal structure
en-keyword=Ycf12
kn-keyword=Ycf12
en-keyword=PsbZ
kn-keyword=PsbZ
en-keyword=Oxygen evolution
kn-keyword=Oxygen evolution
END
start-ver=1.4
cd-journal=joma
no-vol=81
cd-vols=
no-issue=18
article-no=
start-page=180509-1
end-page=180509-4
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=20100517
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Angle-resolved photoemission observation of the superconducting-gap minimum and its relation to the nesting vector in the phonon-mediated superconductor YNi2B2C
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We have performed ultrahigh-resolution angle-resolved photoemission spectroscopy to directly study the large superconducting (SC) gap anisotropy of YNi2B2C. We succeed in measuring momentum (k) dependence of SC gap for individual Fermi surface (FS) sheets, which demonstrates complexity of SC gap in a phonon-mediated superconductor. Within measured k regions on FS sheets, we find a pointlike minimum of SC gap, whose k positions can be connected by the known nesting vector. This shows close correlation between the nesting vector and node formation.
en-copyright=
kn-copyright=
en-aut-name=BabaT
en-aut-sei=Baba
en-aut-mei=T
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=YokoyaT
en-aut-sei=Yokoya
en-aut-mei=T
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=TsudaS
en-aut-sei=Tsuda
en-aut-mei=S
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=WatanabeT
en-aut-sei=Watanabe
en-aut-mei=T
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=NoharaM
en-aut-sei=Nohara
en-aut-mei=M
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=TakagiH
en-aut-sei=Takagi
en-aut-mei=H
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=OguchiT
en-aut-sei=Oguchi
en-aut-mei=T
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=ShinS
en-aut-sei=Shin
en-aut-mei=S
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
affil-num=1
en-affil=
kn-affil=Institute for Solid State Physics, University of Tokyo
affil-num=2
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=Institute for Solid State Physics, University of Tokyo
affil-num=4
en-affil=
kn-affil=Institute for Solid State Physics, University of Tokyo
affil-num=5
en-affil=
kn-affil=Department of Advanced Materials Science, University of Tokyo
affil-num=6
en-affil=
kn-affil=Department of Advanced Materials Science, University of Tokyo
affil-num=7
en-affil=
kn-affil=Department of Quantum Matter, Graduate school of Advanced Sciences of Matter (ADSM), Hiroshima University
affil-num=8
en-affil=
kn-affil=Institute for Solid State Physics, University of Tokyo
END
start-ver=1.4
cd-journal=joma
no-vol=82
cd-vols=
no-issue=19
article-no=
start-page=195114-1
end-page=195114-5
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=20101110
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Electronic structure of pristine and K-doped solid picene: Nonrigid band change and its implication for electron-intramolecular-vibration interaction
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We use photoemission spectroscopy to study electronic structures of pristine and K-doped solid picene. The valence band spectrum of pristine picene consists of three main features with no state at the Fermi level (EF) while that of K-doped picene has three structures similar to those of pristine picene with new states near EF, consistent with the semiconductor-metal transition. The K-induced change cannot be explained with a simple rigid-band model of pristine picene but can be interpreted by molecular-orbital calculations considering electron-intramolecular-vibration interaction. Excellent agreement of the K-doped spectrum with the calculations points to importance of electron-intramolecular-vibration interaction in K-doped picene.
en-copyright=
kn-copyright=
en-aut-name=OkazakiH
en-aut-sei=Okazaki
en-aut-mei=H
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=WakitaT
en-aut-sei=Wakita
en-aut-mei=T
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=MuroT
en-aut-sei=Muro
en-aut-mei=T
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=KajiY
en-aut-sei=Kaji
en-aut-mei=Y
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=LeeX
en-aut-sei=Lee
en-aut-mei=X
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=MitamuraH
en-aut-sei=Mitamura
en-aut-mei=H
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=KawasakiN
en-aut-sei=Kawasaki
en-aut-mei=N
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=KubozonoY
en-aut-sei=Kubozono
en-aut-mei=Y
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
en-aut-name=YamanariY
en-aut-sei=Yamanari
en-aut-mei=Y
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=
en-aut-name=KambeT
en-aut-sei=Kambe
en-aut-mei=T
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=
en-aut-name=KatoT
en-aut-sei=Kato
en-aut-mei=T
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=11
ORCID=
en-aut-name=HiraiM
en-aut-sei=Hirai
en-aut-mei=M
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=12
ORCID=
en-aut-name=MuraokaY
en-aut-sei=Muraoka
en-aut-mei=Y
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=13
ORCID=
en-aut-name=YokoyaT
en-aut-sei=Yokoya
en-aut-mei=T
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=14
ORCID=
affil-num=1
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8
affil-num=4
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=5
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=6
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=7
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=8
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=9
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=10
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=11
en-affil=
kn-affil=Institute for Innovative Science and Technology, Graduate School of Engineering, Nagasaki Institute of Applied Science
affil-num=12
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=13
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=14
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
END
start-ver=1.4
cd-journal=joma
no-vol=82
cd-vols=
no-issue=20
article-no=
start-page=205108-1
end-page=205108-6
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=20101108
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Signature of hidden order and evidence for periodicity modification in URu2Si2
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The detail of electronic structures near the Fermi level in URu2Si2 has been investigated employing state-of-art laser angle-resolved photoemission spectroscopy. The observation of a narrow dispersive band near the Fermi level in the ordered state as well as its absence in a Rh-substituted sample strongly suggest that the emergence of the narrow band is a clear signature of the hidden-order transition. The temperature dependence of the narrow band, which appears at the onset of the hidden-order transition, invokes the occurrence of periodicity modification in the ordered state, which is shown for the first time by any spectroscopic probe. We compare our data to other previous studies and discuss possible implications.
en-copyright=
kn-copyright=
en-aut-name=YoshidaRikiya
en-aut-sei=Yoshida
en-aut-mei=Rikiya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=NakamuraYoshiaki
en-aut-sei=Nakamura
en-aut-mei=Yoshiaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=FukuiMasaki
en-aut-sei=Fukui
en-aut-mei=Masaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=HagaYoshinori
en-aut-sei=Haga
en-aut-mei=Yoshinori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=YamamotoEtsuji
en-aut-sei=Yamamoto
en-aut-mei=Etsuji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=OnukiYoshichika
en-aut-sei=Onuki
en-aut-mei=Yoshichika
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=OkawaMario
en-aut-sei=Okawa
en-aut-mei=Mario
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=ShinShik
en-aut-sei=Shin
en-aut-mei=Shik
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
en-aut-name=HiraiMasaaki
en-aut-sei=Hirai
en-aut-mei=Masaaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=
en-aut-name=MuraokaYuji
en-aut-sei=Muraoka
en-aut-mei=Yuji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=
en-aut-name=YokoyaTakayoshi
en-aut-sei=Yokoya
en-aut-mei=Takayoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=11
ORCID=
affil-num=1
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=4
en-affil=
kn-affil=Advanced Science Research Center, Japan Atomic Energy Agency
affil-num=5
en-affil=
kn-affil=Advanced Science Research Center, Japan Atomic Energy Agency
affil-num=6
en-affil=
kn-affil=Advanced Science Research Center, Japan Atomic Energy Agency
affil-num=7
en-affil=
kn-affil=Institute for Solid State Physics, The University of Tokyo
affil-num=8
en-affil=
kn-affil=Institute for Solid State Physics, The University of Tokyo
affil-num=9
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=10
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=11
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
END
start-ver=1.4
cd-journal=joma
no-vol=18
cd-vols=
no-issue=6
article-no=
start-page=879
end-page=884
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2011
dt-pub=201111
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Development of a soft X-ray angle-resolved photoemission system applicable to 100 ?m crystals
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=A system for angle-resolved photoemission spectroscopy (ARPES) of small single crystals with sizes down to 100 ?m has been developed. Soft X-ray synchrotron radiation with a spot size of `40 ?m ~ 65 ?m at the sample position is used for the excitation. Using this system an ARPES measurement has been performed on a Si crystal of size 120 ?m ~ 100 ?m ~ 80 ?m. The crystal was properly oriented on a sample stage by measuring the Laue spots. The crystal was cleaved in situ with a microcleaver at 100 K. The cleaved surface was adjusted to the beam spot using an optical microscope. Consequently, clear band dispersions along the Γ-X direction reflecting the bulk electronic states were observed with a photon energy of 879 eV.
en-copyright=
kn-copyright=
en-aut-name=MuroTakayuki
en-aut-sei=Muro
en-aut-mei=Takayuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=Katoyukako
en-aut-sei=Kato
en-aut-mei=yukako
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=MatsushitaTomohiro
en-aut-sei=Matsushita
en-aut-mei=Tomohiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=KinoshitaToyohiko
en-aut-sei=Kinoshita
en-aut-mei=Toyohiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=WatanabeYoshio
en-aut-sei=Watanabe
en-aut-mei=Yoshio
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=OkazakiHiroyuki
en-aut-sei=Okazaki
en-aut-mei=Hiroyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=YokoyaTakayoshi
en-aut-sei=Yokoya
en-aut-mei=Takayoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=SekiyamaAkira
en-aut-sei=Sekiyama
en-aut-mei=Akira
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
en-aut-name=Sugahigemasa
en-aut-sei=Suga
en-aut-mei=higemasa
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=
affil-num=1
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)
affil-num=2
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)
affil-num=3
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)
affil-num=4
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)
affil-num=5
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)
affil-num=6
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=7
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=8
en-affil=
kn-affil=Graduate School of Engineering Science, Osaka University
affil-num=9
en-affil=
kn-affil=Graduate School of Engineering Science, Osaka University
en-keyword=angle-resolved photoemission spectroscopy (ARPES)
kn-keyword=angle-resolved photoemission spectroscopy (ARPES)
en-keyword=soft X-ray
kn-keyword=soft X-ray
en-keyword=small crystal
kn-keyword=small crystal
en-keyword=microcleaving
kn-keyword=microcleaving
en-keyword=micropositioning
kn-keyword=micropositioning
END
start-ver=1.4
cd-journal=joma
no-vol=181
cd-vols=
no-issue=2-3
article-no=
start-page=249
end-page=251
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=201008
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Angle-resolved photoemission spectroscopy for VO2 thin films grown on TiO2 (0 0 1) substrates
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We present the results of angle-resolved photoemission spectroscopy (ARPES) measurements of metallic VO2 thin films. The VO2 thin films have been grown on TiO2 (0 0 1) single crystal substrates using pulsed laser deposition. The films exhibit a first-order metal?insulator transition (MIT) at 305 K. In the ARPES spectra of the metallic phase for the films, the O 2p band shows highly dispersive feature in the binding energy range of 3?8 eV along the „C?Z direction. The periodicity of the dispersive band is found to be 2.2 ?-1 which is almost identical with the periodicity expected from the c-axis length of the VO2 thin films. The overall feature of the experimental band structure is similar to the band structure calculations, supporting that we have succeeded in observing the dispersive band of the O 2p state in the metallic VO2 thin film. The present work indicates that the ARPES measurements using epitaxial thin films are promising for determining the band structure of VO2.
en-copyright=
kn-copyright=
en-aut-name=MuraokaY
en-aut-sei=Muraoka
en-aut-mei=Y
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=SaekiK
en-aut-sei=Saeki
en-aut-mei=K
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=YaoY
en-aut-sei=Yao
en-aut-mei=Y
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=WakitaT
en-aut-sei=Wakita
en-aut-mei=T
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=HiraiM
en-aut-sei=Hirai
en-aut-mei=M
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=YokoyaT
en-aut-sei=Yokoya
en-aut-mei=T
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=EguchiR
en-aut-sei=Eguchi
en-aut-mei=R
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=ShinS
en-aut-sei=Shin
en-aut-mei=S
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
affil-num=1
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=4
en-affil=
kn-affil=Faculty of Science, Research Laboratory for Surface Science, Okayama University
affil-num=5
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=6
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=7
en-affil=
kn-affil=RIKEN/SPring-8
affil-num=8
en-affil=
kn-affil=RIKEN/SPring-8
en-keyword=ARPES
kn-keyword=ARPES
en-keyword=VO2
kn-keyword=VO2
en-keyword=Thin film
kn-keyword=Thin film
END
start-ver=1.4
cd-journal=joma
no-vol=470
cd-vols=
no-issue=S1
article-no=
start-page=S641
end-page=S643
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=201012
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Angle-resolved photoemission study of Si electronic structure: Boron concentration dependence
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=The boron concentration dependence of the Si electronic structure of Si(100)2 ~ 1 surfaces were investigated
by angle-resolved photoemission spectroscopy (ARPES). The ARPES spectra exhibit rigid shifts
toward lower binding energy as the boron concentration increases. The band dispersion was obtained
from fitting procedure, and it is found that the top of the valence band does not exceed the Fermi level
even with a boron concentration 35 times larger than the critical concentration of the metal-insulator
transition.
en-copyright=
kn-copyright=
en-aut-name=WakitaTakanori
en-aut-sei=Wakita
en-aut-mei=Takanori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=OkazakiHiroyuki
en-aut-sei=Okazaki
en-aut-mei=Hiroyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=TakanoYoshihiko
en-aut-sei=Takano
en-aut-mei=Yoshihiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=HiraiMasaaki
en-aut-sei=Hirai
en-aut-mei=Masaaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=MuraokaYuji
en-aut-sei=Muraoka
en-aut-mei=Yuji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=YokoyaTakayoshi
en-aut-sei=Yokoya
en-aut-mei=Takayoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
affil-num=1
en-affil=
kn-affil=Research Laboratory for Surface Science (RLSS), Okayama University
affil-num=2
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=National Institute for Material Science (NIMS)
affil-num=4
en-affil=
kn-affil=Research Laboratory for Surface Science (RLSS), Okayama University
affil-num=5
en-affil=
kn-affil=Research Laboratory for Surface Science (RLSS), Okayama University
affil-num=6
en-affil=
kn-affil=Research Laboratory for Surface Science (RLSS), Okayama University
END
start-ver=1.4
cd-journal=joma
no-vol=470
cd-vols=
no-issue=S1
article-no=
start-page=S389
end-page=S390
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=201012
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Analysis on photoemission spectrum of superconducting FeSe
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=In this paper, we present the result of soft X-ray photoemission spectroscopy and its comparison with the density functional calculation. Although local density approximation seems to be a good starting point for describing the electronic structure of FeSe, the simulated spectrum poorly reproduced the structure around E(B) = 2 eV. This result suggests the necessity of theoretical treatment beyond local density approximation.
en-copyright=
kn-copyright=
en-aut-name=YoshidaRikiya
en-aut-sei=Yoshida
en-aut-mei=Rikiya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=WakitaTakanori
en-aut-sei=Wakita
en-aut-mei=Takanori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=OkazakiHiroyuki
en-aut-sei=Okazaki
en-aut-mei=Hiroyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=MizuguchiYoshikazu
en-aut-sei=Mizuguchi
en-aut-mei=Yoshikazu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=TsudaShunsuke
en-aut-sei=Tsuda
en-aut-mei=Shunsuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=TakanoYoshihiko
en-aut-sei=Takano
en-aut-mei=Yoshihiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=TakeyaHiroyuki
en-aut-sei=Takeya
en-aut-mei=Hiroyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=HirataKazuto
en-aut-sei=Hirata
en-aut-mei=Kazuto
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
en-aut-name=KatoYukako
en-aut-sei=Kato
en-aut-mei=Yukako
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=
en-aut-name=MuroTakayuki
en-aut-sei=Muro
en-aut-mei=Takayuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=
en-aut-name=OkawaMario
en-aut-sei=Okawa
en-aut-mei=Mario
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=11
ORCID=
en-aut-name=IshizakaKyoko
en-aut-sei=Ishizaka
en-aut-mei=Kyoko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=12
ORCID=
en-aut-name=ShinShik
en-aut-sei=Shin
en-aut-mei=Shik
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=13
ORCID=
en-aut-name=HarimaHisatomo
en-aut-sei=Harima
en-aut-mei=Hisatomo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=14
ORCID=
en-aut-name=HiraiMasaaki
en-aut-sei=Hirai
en-aut-mei=Masaaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=15
ORCID=
en-aut-name=MuraokaYuji
en-aut-sei=Muraoka
en-aut-mei=Yuji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=16
ORCID=
en-aut-name=YokoyaTakayoshi
en-aut-sei=Yokoya
en-aut-mei=Takayoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=17
ORCID=
affil-num=1
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=Research Laboratory for Surface Science (RLSS), Okayama University
affil-num=3
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=4
en-affil=
kn-affil=JST, Transformative Research-Project on Iron Pnictides (TRIP)
affil-num=5
en-affil=
kn-affil=JST, Transformative Research-Project on Iron Pnictides (TRIP)
affil-num=6
en-affil=
kn-affil=JST, Transformative Research-Project on Iron Pnictides (TRIP)
affil-num=7
en-affil=
kn-affil=National Institute for Material Science
affil-num=8
en-affil=
kn-affil=National Institute for Material Science
affil-num=9
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8
affil-num=10
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8
affil-num=11
en-affil=
kn-affil=Institute for Solid State Physics, The University of Tokyo
affil-num=12
en-affil=
kn-affil=Institute for Solid State Physics, The University of Tokyo
affil-num=13
en-affil=
kn-affil=Institute for Solid State Physics, The University of Tokyo
affil-num=14
en-affil=
kn-affil=JST, Transformative Research-Project on Iron Pnictides (TRIP)
affil-num=15
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=16
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=17
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
en-keyword=Iron chalcogenide superconductor
kn-keyword=Iron chalcogenide superconductor
en-keyword=FeSe
kn-keyword=FeSe
en-keyword=Photoemission spectroscopy
kn-keyword=Photoemission spectroscopy
en-keyword=Band calculation
kn-keyword=Band calculation
END
start-ver=1.4
cd-journal=joma
no-vol=72
cd-vols=
no-issue=5
article-no=
start-page=580
end-page=581
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2011
dt-pub=20110501
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Ultrahigh-resolution laser photoemission study of URu2Si2 across the hidden-order transition
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We have studied the electronic structures of URu2Si2 employing ultrahigh-resolutionlaser angle-resolved photoemission spectroscopy. The change of photoemission spectra is investigated across the hidden-ordertransition, and the emergence of a narrow band is clearly observed near the Fermi level for both (ƒÎ,0) and (ƒÎ,ƒÎ) directions. In addition, it is shown that tuning of light's polarization allows the signal of a hole-like dispersive feature to enhance. These observations prove that laser angle-resolved photoemission spectroscopy is an effective tool for studying the evolution of electronic structures across the hidden-ordertransition in URu2Si2.
en-copyright=
kn-copyright=
en-aut-name=YoshidaRikiya
en-aut-sei=Yoshida
en-aut-mei=Rikiya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=NakamuraYoshiaki
en-aut-sei=Nakamura
en-aut-mei=Yoshiaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=FukuiMasaki
en-aut-sei=Fukui
en-aut-mei=Masaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=HagaYoshinori
en-aut-sei=Haga
en-aut-mei=Yoshinori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=YamamotoEtsuji
en-aut-sei=Yamamoto
en-aut-mei=Etsuji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=?nukiYoshichika
en-aut-sei=?nuki
en-aut-mei=Yoshichika
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=OkawaMario
en-aut-sei=Okawa
en-aut-mei=Mario
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=ShinShik
en-aut-sei=Shin
en-aut-mei=Shik
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
en-aut-name=HiraiMasaaki
en-aut-sei=Hirai
en-aut-mei=Masaaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=
en-aut-name=MuraokaYuji
en-aut-sei=Muraoka
en-aut-mei=Yuji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=
en-aut-name=YokoyaTakayoshi
en-aut-sei=Yokoya
en-aut-mei=Takayoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=11
ORCID=
affil-num=1
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=4
en-affil=
kn-affil=Advanced Science Research Center, Japan Atomic Energy Agency
affil-num=5
en-affil=
kn-affil=Advanced Science Research Center, Japan Atomic Energy Agency
affil-num=6
en-affil=
kn-affil=Advanced Science Research Center, Japan Atomic Energy Agency
affil-num=7
en-affil=
kn-affil=Institute for Solid State Physics, The University of Tokyo
affil-num=8
en-affil=
kn-affil=Institute for Solid State Physics, The University of Tokyo
affil-num=9
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=10
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=11
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
en-keyword=Electronic structure
kn-keyword=Electronic structure
en-keyword=Laser angle-resolved photoemission spectroscopy
kn-keyword=Laser angle-resolved photoemission spectroscopy
en-keyword=URu2Si2
kn-keyword=URu2Si2
en-keyword=Hidden order
kn-keyword=Hidden order
END
start-ver=1.4
cd-journal=joma
no-vol=86
cd-vols=
no-issue=1
article-no=
start-page=014521-1
end-page=014521-5
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2012
dt-pub=20120726
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Comparative photoemission studies on the superconducting gap of the filled skutterudite superconductors LaPt4Ge12 and PrPt4Ge12
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We performed a comparative study of the superconducting gap in the new filled skutterudite superconductors LaPt4Ge12 and PrPt4Ge12 using high-resolution photoemission spectroscopy. We succeeded in observing spectral changes across Tc that reflect the opening of the superconducting gap in both compounds and also in observing a noticeable difference in their respective superconducting spectral shapes near the Fermi level, pointing toward a more complex superconducting gap structure in PrPt4Ge12. In addition, we found that the two-gap model is more suitable for describing the superconducting-state spectrum of PrPt4Ge12 than the single-isotropic-gap and single-anisotropic-gap models, which suggests an explanation that multiband effects may possibly induce the anomalous superconducting properties of PrPt4Ge12.
en-copyright=
kn-copyright=
en-aut-name=NakamuraYoshiaki
en-aut-sei=Nakamura
en-aut-mei=Yoshiaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=OkazakiHiroyuki
en-aut-sei=Okazaki
en-aut-mei=Hiroyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=YoshidaRikiya
en-aut-sei=Yoshida
en-aut-mei=Rikiya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=WakitaTakanori
en-aut-sei=Wakita
en-aut-mei=Takanori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=TakeyaHiroyuki
en-aut-sei=Takeya
en-aut-mei=Hiroyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=HirataKazuto
en-aut-sei=Hirata
en-aut-mei=Kazuto
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=HiraiMasaaki
en-aut-sei=Hirai
en-aut-mei=Masaaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=MuraokaYuji
en-aut-sei=Muraoka
en-aut-mei=Yuji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
en-aut-name=YokoyaTakayoshi
en-aut-sei=Yokoya
en-aut-mei=Takayoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=
affil-num=1
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=4
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=5
en-affil=
kn-affil=National Institute for Materials Science (NIMS)
affil-num=6
en-affil=
kn-affil=National Institute for Materials Science (NIMS)
affil-num=7
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=8
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=9
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
END
start-ver=1.4
cd-journal=joma
no-vol=79
cd-vols=
no-issue=12
article-no=
start-page=124701-1
end-page=124701-4
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=20101125
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Electronic Structure of the Novel Filled Skutterudite PrPt4Ge12 Superconductor
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We have performed soft x-ray photoemission spectroscopy (SXPES) and resonant photoemission spectroscopy (RPES) of the filled skutterudite superconductor PrPt4Ge12 in order to study the electronic structure of valence band and the character of Pr 4f. SXPES of PrPt4Ge12 measured with 1200 eV photon energy, where spectral contribution of Pr 4f is negligible, was found nearly identical with that of LaPt4Ge12, indicating similarity of Pt?Ge derived electronic states of the two compounds. Good correspondence with band calculations allows us to ascribe the dominant Ge 4p character of the density of states at the Fermi level (EF). Pr 3d ¨ 4f RPES shows that, although Pr 4f electrons in PrPt4Ge12 are not as strongly hybridized with conduction electrons near EF as in PrFe4P12, there are finite Pr 4f contribution to the states near EF in PrPt4Ge12. These PES results give the information of fundamental electronic structure for understanding the physical properties of the novel filled skutterudite superconductor PrPt4Ge12.
en-copyright=
kn-copyright=
en-aut-name=NakamuraYoshiaki
en-aut-sei=Nakamura
en-aut-mei=Yoshiaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=OkazakiHiroyuki
en-aut-sei=Okazaki
en-aut-mei=Hiroyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=YoshidaRikiya
en-aut-sei=Yoshida
en-aut-mei=Rikiya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=WakitaTakanori
en-aut-sei=Wakita
en-aut-mei=Takanori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=HiraiMasaaki
en-aut-sei=Hirai
en-aut-mei=Masaaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=MuraokaYuji
en-aut-sei=Muraoka
en-aut-mei=Yuji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=TakeyaHiroyuki
en-aut-sei=Takeya
en-aut-mei=Hiroyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=HirataKazuto
en-aut-sei=Hirata
en-aut-mei=Kazuto
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
en-aut-name=KumigashiraHiroshi
en-aut-sei=Kumigashira
en-aut-mei=Hiroshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=
en-aut-name=OshimaMasaharu
en-aut-sei=Oshima
en-aut-mei=Masaharu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=
en-aut-name=YokoyaTakayoshi
en-aut-sei=Yokoya
en-aut-mei=Takayoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=11
ORCID=
affil-num=1
en-affil=
kn-affil=The Graduate School of Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=The Graduate School of Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=The Graduate School of Science and Technology, Okayama University
affil-num=4
en-affil=
kn-affil=The Graduate School of Science and Technology, Okayama University
affil-num=5
en-affil=
kn-affil=The Graduate School of Science and Technology, Okayama University
affil-num=6
en-affil=
kn-affil=The Graduate School of Science and Technology, Okayama University
affil-num=7
en-affil=
kn-affil=National Institute for Materials Science (NIMS)
affil-num=8
en-affil=
kn-affil=National Institute for Materials Science (NIMS)
affil-num=9
en-affil=
kn-affil=CREST, Japan Science and Technology Corporation (JST)
affil-num=10
en-affil=
kn-affil=CREST, Japan Science and Technology Corporation (JST)
affil-num=11
en-affil=
kn-affil=The Graduate School of Science and Technology, Okayama University
en-keyword=PrPt4Ge12
kn-keyword=PrPt4Ge12
en-keyword=filled skutterudite
kn-keyword=filled skutterudite
en-keyword=superconductor
kn-keyword=superconductor
en-keyword=soft x-ray photoemission spectroscopy
kn-keyword=soft x-ray photoemission spectroscopy
en-keyword=Pr 3d ¨ 4f resonant photoemission
kn-keyword=Pr 3d ¨ 4f resonant photoemission
en-keyword=electronic structure
kn-keyword=electronic structure
END
start-ver=1.4
cd-journal=joma
no-vol=470
cd-vols=
no-issue=S1
article-no=
start-page=S637
end-page=S638
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=201012
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Photoemission study of Ca-intercalated graphite superconductor CaC6
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=In this work, we have performed resonant photoemission studies of Ca-intercalated graphite superconductor CaC6. Using photon energy of the Ca 2p-3d threshold, the photoemission intensity of the peak at Fermi energy (E-F) is resonantly enhanced. This result provides spectroscopic evidence for the existence of Ca 3d states at E-F, and strongly supports that Ca 3d state plays a crucial role for the superconductivity of this material with relatively high T-c.
en-copyright=
kn-copyright=
en-aut-name=OkazakiHiroyuki
en-aut-sei=Okazaki
en-aut-mei=Hiroyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=YoshidaRikiya
en-aut-sei=Yoshida
en-aut-mei=Rikiya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=IwaiKeisuke
en-aut-sei=Iwai
en-aut-mei=Keisuke
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=NoamiKengo
en-aut-sei=Noami
en-aut-mei=Kengo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=MuroTakayuki
en-aut-sei=Muro
en-aut-mei=Takayuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=NakamuraTetsuya
en-aut-sei=Nakamura
en-aut-mei=Tetsuya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=WakitaTakanori
en-aut-sei=Wakita
en-aut-mei=Takanori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=MuraokaYuji
en-aut-sei=Muraoka
en-aut-mei=Yuji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
en-aut-name=HiraiMasaaki
en-aut-sei=Hirai
en-aut-mei=Masaaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=
en-aut-name=TomiokaFumiaki
en-aut-sei=Tomioka
en-aut-mei=Fumiaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=
en-aut-name=TakanoYoshihiko
en-aut-sei=Takano
en-aut-mei=Yoshihiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=11
ORCID=
en-aut-name=TakenakaAsami
en-aut-sei=Takenaka
en-aut-mei=Asami
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=12
ORCID=
en-aut-name=ToyodaMasahiro
en-aut-sei=Toyoda
en-aut-mei=Masahiro
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=13
ORCID=
en-aut-name=OguchTamio
en-aut-sei=Oguch
en-aut-mei=Tamio
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=14
ORCID=
en-aut-name=YokoyaTakayoshi
en-aut-sei=Yokoya
en-aut-mei=Takayoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=15
ORCID=
affil-num=1
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=4
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=5
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8
affil-num=6
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8
affil-num=7
en-affil=
kn-affil=Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency
affil-num=8
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=9
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=10
en-affil=
kn-affil=National Institute for Materials Science (NIMS)
affil-num=11
en-affil=
kn-affil=National Institute for Materials Science (NIMS)
affil-num=12
en-affil=
kn-affil=Faculty of Engineering, Oita University
affil-num=13
en-affil=
kn-affil=Faculty of Engineering, Oita University
affil-num=14
en-affil=
kn-affil=Department of Quantum Matter, Graduate School of Advanced Sciences of Matter (ADSM)
affil-num=15
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
END
start-ver=1.4
cd-journal=joma
no-vol=72
cd-vols=
no-issue=5
article-no=
start-page=582
end-page=584
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2011
dt-pub=20110501
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Photoemission study of electronic structure evolution across the metal-insulator transition of heavily B-doped diamond
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We studied the electronic structure evolution of heavily B-doped diamond films across the metal-insulator transition (MIT) using ultraviolet photoemission spectroscopy (UPS). From high-temperature UPS, through which electronic states near the Fermi level (E(F)) up to similar to 5k(B)T can be observed (k(B) is the Boltzmann constant and T the temperature), we observed the carrier concentration dependence of spectral shapes near E(F). Using another carrier concentration dependent UPS, we found that the change in energy position of sp-band of the diamond valence band, which corresponds to the shift of E(F), can be explained by the degenerate semiconductor model, indicating that the diamond valence band is responsible for the metallic states for samples with concentrations above MIT. We discuss a possible electronic structure evolution across MIT.
en-copyright=
kn-copyright=
en-aut-name=OkazakiH.
en-aut-sei=Okazaki
en-aut-mei=H.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=ArakaneT.
en-aut-sei=Arakane
en-aut-mei=T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=SugawaraK.
en-aut-sei=Sugawara
en-aut-mei=K.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=SatoT.
en-aut-sei=Sato
en-aut-mei=T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=TakahashiT.
en-aut-sei=Takahashi
en-aut-mei=T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=WakitaT.
en-aut-sei=Wakita
en-aut-mei=T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=HiraiM.
en-aut-sei=Hirai
en-aut-mei=M.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=MuraokaY.
en-aut-sei=Muraoka
en-aut-mei=Y.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
en-aut-name=TakanoY.
en-aut-sei=Takano
en-aut-mei=Y.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=
en-aut-name=IshiiS.
en-aut-sei=Ishii
en-aut-mei=S.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=
en-aut-name=IriyamaS.
en-aut-sei=Iriyama
en-aut-mei=S.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=11
ORCID=
en-aut-name=KawaradaH.
en-aut-sei=Kawarada
en-aut-mei=H.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=12
ORCID=
en-aut-name=YokoyaT.
en-aut-sei=Yokoya
en-aut-mei=T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=13
ORCID=
affil-num=1
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=Department of Physics, Tohoku University
affil-num=3
en-affil=
kn-affil=WPI Research Center, Advanced Institute for Materials Research, Tohoku University
affil-num=4
en-affil=
kn-affil=Advanced Science Research Center, Japan Atomic Energy Agency
affil-num=5
en-affil=
kn-affil=Department of Physics, Tohoku University
affil-num=6
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=7
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=8
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=9
en-affil=
kn-affil=National Institute for Materials Science
affil-num=10
en-affil=
kn-affil=National Institute for Materials Science
affil-num=11
en-affil=
kn-affil=School of Science and Engineering, Waseda University
affil-num=12
en-affil=
kn-affil=School of Science and Engineering, Waseda University
affil-num=13
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
END
start-ver=1.4
cd-journal=joma
no-vol=107
cd-vols=
no-issue=7
article-no=
start-page=073910-1
end-page=073910-6
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=20100401
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Room temperature ferromagnetic behavior in the hollandite-type titanium oxide
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=A hollandite-type K(x)Ti(8)O(16) polycrystalline sample has been prepared and studied by magnetization, resistivity and x-ray photoelectron spectroscopy (XPS). Room temperature ferromagnetic behavior is observed in the magnetic hysteresis measurement. The sample shows a semiconductive temperature dependence in the resistivity measurement. Analysis of the Ti 2p(3/2) core-level XPS spectrum indicates that the titanium ions have a mixed valence of Ti(4+) and Ti(3+). In addition, the valence band spectrum reveals that the 3d electrons tend to localize on Ti(3+) ions in the hollandite-type TiO(2) lattice. Also, analysis of the valence band spectrum shows that the prepared sample is a wide-gap oxide with a band gap of 3.6 eV. These results indicate that the present hollandite-type K(x)Ti(8)O(16) sample can be classified as a TiO(2)-based wide-gap semiconductor with Curie temperature above room temperature. Room temperature ferromagnetism (RTFM) decreases in the sample prepared under a strong reducing gas atmosphere, accompanied with the decrease in the resistivity. The results imply that the localized 3d electrons are responsible for the RTFM of the K(x)Ti(8)O(16) sample.
en-copyright=
kn-copyright=
en-aut-name=NoamiK.
en-aut-sei=Noami
en-aut-mei=K.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=MuraokaY.
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kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=WakitaT.
en-aut-sei=Wakita
en-aut-mei=T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=HiraiM.
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kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=KatoY.
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kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=MuroT.
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kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=TamenoriY.
en-aut-sei=Tamenori
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kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=YokoyaT.
en-aut-sei=Yokoya
en-aut-mei=T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
affil-num=1
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=Faculty of Science, Research Laboratory for Surface Science, Okayama University
affil-num=4
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=5
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8
affil-num=6
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8
affil-num=7
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8
affil-num=8
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
END
start-ver=1.4
cd-journal=joma
no-vol=108
cd-vols=
no-issue=4
article-no=
start-page=043916-1
end-page=043916-4
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2010
dt-pub=20100815
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Bulk and surface physical properties of a CrO2 thin film prepared from a Cr8O21 precursor
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We have prepared a CrO(2) thin film by chemical vapor deposition from a Cr(8)O(21) precursor and studied the bulk and surface physical properties. The CrO(2) thin film is grown on a TiO(2) (100) substrate by heating of a Cr(8)O(21) precursor and TiO(2) (100) substrate together in a sealed quartz tube. The prepared film is found from x-ray diffraction analysis to be an (100)-oriented single phase. The magnetization and resistivity measurements indicate that the film is a ferromagnetic metal with a Curie temperature of about 400 K. Cr 3s core-level and valence band photoelectron spectroscopy spectra reveal the presence of a metallic CrO(2) in the surface region of the film. Our work indicates that preparation from a Cr(8)O(21) precursor is promising for obtaining a CrO(2) thin film with the metallic surface.
en-copyright=
kn-copyright=
en-aut-name=IwaiK.
en-aut-sei=Iwai
en-aut-mei=K.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=MuraokaY.
en-aut-sei=Muraoka
en-aut-mei=Y.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=WakitaT.
en-aut-sei=Wakita
en-aut-mei=T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=HiraiM.
en-aut-sei=Hirai
en-aut-mei=M.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=YokoyaT.
en-aut-sei=Yokoya
en-aut-mei=T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=KatoY.
en-aut-sei=Kato
en-aut-mei=Y.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=MuroT.
en-aut-sei=Muro
en-aut-mei=T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=TamenoriY.
en-aut-sei=Tamenori
en-aut-mei=Y.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
affil-num=1
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=Faculty of Science, Research Laboratory for Surface Science, Okayama University
affil-num=4
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=5
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=6
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8
affil-num=7
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8
affil-num=8
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8
END
start-ver=1.4
cd-journal=joma
no-vol=109
cd-vols=
no-issue=4
article-no=
start-page=043702-1
end-page=043702-6
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2011
dt-pub=20110215
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Spectroscopic evidence of the formation of (V,Ti)O2 solid solution in VO2 thinner films grown on TiO2(001) substrates
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We have prepared VO2 thin films epitaxially grown on TiO2(001) substrates with thickness systematically varied from 2.5 to 13 nm using a pulsed laser deposition method, and studied the transport property and electronic states of the films by means of resistivity and in situ synchrotron photoemission spectroscopy (SRPES). In resistivity measurements, the 13-nm-thick film exhibits a metal-insulator transition at around 290 K on cooling with change of three orders of magnitudes in resistivity. As the film thickness decreases, the metal-insulator transition broadens and the transition temperature increases. Below 4 nm, the films do not show the transition and become insulators. In situ SRPES measurements of near the Fermi level valence band find that the electronic state of the 2.5-nm-thick film is different than that of the temperature-induced insulator phase of VO2 itself although these two states are insulating. Ti 2p core-level photoemission measurements reveal that Ti ions exist near the interface between the films and TiO2 substrates, with a chemical state similar to that in (V,Ti)O-2 solid solution. These results indicate that insulating (V,Ti)O-2 solid solution is formed in the thinner films. We propose a simple growth model of a VO2 thin film on a TiO2(001) substrate. Near the interface, insulating (V,Ti) O-2 solid solution is formed due to the diffusion of Ti ions from the TiO2 substrate into the VO2 film. The concentration of Ti in (V,Ti) O-2 is relatively high near the interface and decreases toward the surface of the film. Beyond a certain film thickness (about 7 nm in the case of the present 13-nm-thick film), the VO2 thin film without any Ti ions starts to grow. Our work suggests that developing a technique for preparing the sharp interface between the VO2 thin films and TiO2 substrates is a key issue to study the physical property of an ultrathin film of "pure" VO2, especially to examine the presence of the novel electronic state called a semi-Dirac point phase predicted by calculations.
en-copyright=
kn-copyright=
en-aut-name=MuraokaY.
en-aut-sei=Muraoka
en-aut-mei=Y.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=SaekiK.
en-aut-sei=Saeki
en-aut-mei=K.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=EguchiR.
en-aut-sei=Eguchi
en-aut-mei=R.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=WakitaT.
en-aut-sei=Wakita
en-aut-mei=T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=HiraiM.
en-aut-sei=Hirai
en-aut-mei=M.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=YokoyaT.
en-aut-sei=Yokoya
en-aut-mei=T.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=ShinS.
en-aut-sei=Shin
en-aut-mei=S.
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
affil-num=1
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=4
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=5
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=6
en-affil=
kn-affil=Graduate School of Natural Science and Technology, Okayama University
affil-num=7
en-affil=
kn-affil=RIKEN/SPring-8
END
start-ver=1.4
cd-journal=joma
no-vol=98
cd-vols=
no-issue=8
article-no=
start-page=082107-1
end-page=082107-3
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2011
dt-pub=20110221
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Multiple phosphorus chemical sites in heavily phosphorus-doped diamond
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=We have performed high-resolution core level photoemission spectroscopy on a heavily phosphorus (P)-doped diamond film in order to elucidate the chemical sites of doped-phosphorus atoms in diamond. P 2p core level study shows two bulk components, providing spectroscopic evidence for multiple chemical sites of doped-phosphorus atoms. This indicates that only a part of doped-phosphorus atoms contribute to the formation of carriers. From a comparison with band calculations, possible origins for the chemical sites are discussed.
en-copyright=
kn-copyright=
en-aut-name=OkazakiHiroyuki
en-aut-sei=Okazaki
en-aut-mei=Hiroyuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=
en-aut-name=YoshidaRikiya
en-aut-sei=Yoshida
en-aut-mei=Rikiya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=
en-aut-name=MuroTakayuki
en-aut-sei=Muro
en-aut-mei=Takayuki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=
en-aut-name=NakamuraTetsuya
en-aut-sei=Nakamura
en-aut-mei=Tetsuya
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=
en-aut-name=WakitaTakanori
en-aut-sei=Wakita
en-aut-mei=Takanori
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=5
ORCID=
en-aut-name=MuraokaYuji
en-aut-sei=Muraoka
en-aut-mei=Yuji
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=6
ORCID=
en-aut-name=HiraiMasaaki
en-aut-sei=Hirai
en-aut-mei=Masaaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=7
ORCID=
en-aut-name=KatoHiromitsu
en-aut-sei=Kato
en-aut-mei=Hiromitsu
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=8
ORCID=
en-aut-name=YamasakiSatoshi
en-aut-sei=Yamasaki
en-aut-mei=Satoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=9
ORCID=
en-aut-name=TakanoYoshihiko
en-aut-sei=Takano
en-aut-mei=Yoshihiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=10
ORCID=
en-aut-name=IshiiSatoshi
en-aut-sei=Ishii
en-aut-mei=Satoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=11
ORCID=
en-aut-name=OguchiTamio
en-aut-sei=Oguchi
en-aut-mei=Tamio
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=12
ORCID=
en-aut-name=YokoyaTakayoshi
en-aut-sei=Yokoya
en-aut-mei=Takayoshi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=13
ORCID=
affil-num=1
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=2
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=3
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8
affil-num=4
en-affil=
kn-affil=Japan Synchrotron Radiation Research Institute (JASRI)/SPring-8
affil-num=5
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=6
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=7
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
affil-num=8
en-affil=
kn-affil=Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
affil-num=9
en-affil=
kn-affil=Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST)
affil-num=10
en-affil=
kn-affil=National Institute for Materials Science (NIMS)
affil-num=11
en-affil=
kn-affil=National Institute for Materials Science (NIMS)
affil-num=12
en-affil=
kn-affil=Institute of Scientific and Industrial Research, Osaka University
affil-num=13
en-affil=
kn-affil=The Graduate School of Natural Science and Technology, Okayama University
END