フルテキストURL PhysRevB_93_094507.pdf
著者 Tanaka, Kenta K.| Ichioka, Masanori| Onari, Seiichiro|
抄録 In order to identify the pairing symmetry with chirality, we study site-selective NMR in chiral p-wave superconductors. We calculate local nuclear relaxation rate T-1(-1) in the vortex lattice state by Eilenberger theory, including the applied magnetic field dependence. We find that T-1(-1) in the NMR resonance line shape is different between two chiral states p +/-(= p(x)+/- ip(y)), depending on whether the chirality is parallel or antiparallel to the vorticity. Anomalous suppression of T-1(-1) occurs around the vortex core in the chiral p(-) wave due to the negative coherence term coming from the odd-frequency s-wave Cooper pair induced around the vortex with Majorana state.
備考 This is an article published by American Physical Society
発行日 2016-03
出版物タイトル Physical Review B
93巻
9号
出版者 American Physical Society
開始ページ 094507
ISSN 2469-9950
NCID AA11187113
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 American Physical Society
論文のバージョン publisher
DOI 10.1103/PhysRevB.93.094507
Web of Sience KeyUT 000371727300005
関連URL isVersionOf https://doi.org/10.1103/PhysRevB.93.094507
フルテキストURL PhysRevB_95_064512.pdf
著者 Ichioka, Masanori| Kogan, V. G.| Schmalian, J.|
抄録 A model of a clean two-band s-wave superconductor with cylindrical Fermi surfaces, different Fermi velocities v(1),(2), and a general 2x2 coupling matrix V-alpha beta is used to study the order parameter distribution in vortex lattices. The Eilenberger weak coupling formalism is used to calculate numerically the spatial distributions of the pairing amplitudes Delta(1) and Delta(2) of the two bands for vortices parallel to the Fermi cylinders. For generic values of the interband coupling V-12, it is shown that, independently of the couplings V-alpha beta, of the ratio v(1)/v(2), of the temperature, and the applied field, the length scales of spatial variation of Delta(1) and of Delta(2) are the same within the accuracy of our calculations. The only exception from this single length-scale behavior is found for V-12 << V-11, i.e., for nearly decoupled bands.
備考 This is an article published by American Physical Society
発行日 2017-02
出版物タイトル Physical Review B
95巻
6号
出版者 American Physical Society
開始ページ 064512
ISSN 2469-9950
NCID AA11187113
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 ©2017 American Physical Society
論文のバージョン publisher
DOI 10.1103/PhysRevB.95.064512
Web of Sience KeyUT 000394657300012
関連URL isVersionOf https://doi.org/10.1103/PhysRevB.95.064512
フルテキストURL PhysRevB_95_134502.pdf
著者 Tanaka, Kenta K.| Ichioka, Masanori| Onari, Seiichiro|
抄録 Properties of the vortex state in helical p-wave superconductor are studied by the quasiclassical Eilenberger theory. We confirm the instability of the helical p-wave state at high fields and that the spin-polarized local density of states M(E,r) appears even when Knight shift does not change. This is because the vorticity couples to the chirality of up-spin pair or down-spin pair of the helical state. In order to identify the helical p-wave state at low fields, we investigate the structure of the zero-energy M(E = 0,r) in the vortex states, and also the energy spectra of M(E,r).
備考 This is an article published by American Physical Society
発行日 2017-04
出版物タイトル Physical Review B
95巻
13号
出版者 American Physical Society
開始ページ 134502
ISSN 2469-9950
NCID AA11187113
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 ©2017 American Physical Society
論文のバージョン publisher
DOI 10.1103/PhysRevB.95.134502
Web of Sience KeyUT 000399381300005
関連URL isVersionOf https://doi.org/10.1103/PhysRevB.95.134502
フルテキストURL PhysRevB_96_094522.pdf
著者 Nabeta, Masahiro| Tanaka, Kenta K.| Onari, Seiichiro| Ichioka, Masanori|
抄録 The roles of paramagnetic and diamagnetic pair-breaking effects in superconductivity in the electric-field-induced surface metallic state are studied using the Bogoliubov–de Gennes equation when magnetic fields are applied parallel to the surface. The multigap states of the subbands are related to the depth dependence and the magnetic field dependence of the superconductivity. In the Fermi-energy density of states and the spin density, subband contributions successively appear from higher-level subbands with increasing magnetic fields. The characteristic magnetic field dependence may be a key feature to identify the multigap structure of the surface superconductivity.
備考 This is an article published by American Physical Society
発行日 2017-09
出版物タイトル Physical Review B
96巻
9号
出版者 American Physical Society
開始ページ 094522
NCID AA11187113
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 ©2017 American Physical Society
論文のバージョン publisher
DOI 10.1103/PhysRevB.96.094522
Web of Sience KeyUT 000411161700006
関連URL isVersionOf https://doi.org/10.1103/PhysRevB.96.094522
フルテキストURL PhysRevB_96_094527.pdf
著者 Onari, Seiichiro| Kontani, Hiroshi|
抄録 The origin of the electronic nematicity and its remarkable material dependence are famous longstanding unsolved issues in Fe-based superconductors. To attack these issues, we focus on the in-plane anisotropy of the resistivity: In the nematic state in FeSe, the relationp(x) >p(y) holds, whereP(x)(y) is the resistivity along the longer (shorter) Fe-Fe axis. In contrast, the opposite anisotropy p(x) < p(y) is realized in other undoped Fe-based superconductors. Such nontrivial material dependence is naturally explained in terms of the strongly orbitaldependent inelastic quasiparticle scattering realized in the orbital-ordered state. The opposite anisotropy between FeSe (p(x) >p(y)) and other undoped compounds (P-x < P-y) reflects the difference in the number of hole pockets. We also explain the large in-plane anisotropy of the thermoelectric power in the nematic state.
備考 This is an article published by American Physical Society
発行日 2017-09-26
出版物タイトル Physical Review B
96巻
9号
出版者 American Physical Society
開始ページ 094527
ISSN 2469-9950
NCID AA11187113
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 ©2017 American Physical Society
論文のバージョン publisher
DOI 10.1103/PhysRevB.96.094527
Web of Sience KeyUT 000411768000002
関連URL isVersionOf http://doi.org/10.1103/PhysRevB.96.094527
フルテキストURL PhysRevE_91_016302.pdf
著者 Yagasaki, Takuma| Matsumoto, Masakazu| Tanaka, Hideki|
抄録 Two different scenarios have been proposed on the phase separation occurring in the deeply supercooled liquid water. We discuss what we can derive from our simulation results for the two scenarios and propose a way for future investigation. We also demonstrate that the phase separation in the supercooled liquid water looks like the separation of liquid water and vapor just below the conventional critical point.
発行日 2015-01-23
出版物タイトル Physical review. E, Statistical, nonlinear, and soft matter physics
91巻
1号
出版者 American Physical Society
開始ページ 016302
ISSN 1539-3755
NCID AA11558033
資料タイプ 学術雑誌論文
言語 English
OAI-PMH Set 岡山大学
著作権者 https://creativecommons.org/licenses/by-nc-nd/4.0/deed.ja
論文のバージョン publisher
PubMed ID 25679745
DOI 10.1103/PhysRevE.91.016302
Web of Sience KeyUT 000349487700008
関連URL https://doi.org/10.1103/PhysRevE.91.016302
著者 Matsumoto, Masakazu| Yagasaki, Takuma| Tanaka, Hideki|
発行日 2015-11-06
出版物タイトル Physical Review Letters
115巻
19号
資料タイプ 学術雑誌論文