フルテキストURL PhysRevB_95_085109.pdf
著者 Wakita, Takanori| Terashima, Kensei| Hamada, Takahiro| Fujiwara, Hirokazu| Minohara, Makoto| Kobayashi, Masaki| Horiba, Koji| Kumigashira, Hiroshi| Kutluk, Galif| Nagao, Masanori| Watauchi, Satoshi| Tanaka, Isao| Demura, Satoshi| Okazaki, Hiroyuki| Takano, Yoshihiko| Mizuguchi, Yoshikazu| Miura, Osuke| Okada, Kozo| Muraoka, Yuji| Yokoya, Takayoshi|
抄録 We use soft x-ray photoemission spectroscopy (SXPES) to investigate Ce 4f electronic states of a new BiS2 layered superconductor CeO1-xFxBiS2, for polycrystalline and single-crystal samples. The Ce 3d spectrum of the single crystal of nominal composition x = 0.7 has no f(0) component and the spectral shape closely resembles the ones observed for Ce trivalent insulating compounds, strongly implying that the CeO layer is still in an insulating state even after the F doping. The Ce 3d-4f resonant SXPES for both polycrystalline and single-crystal samples shows that the prominent peak is located around 1 eV below the Fermi level (E-F) with negligible spectral intensity at EF. The F-concentration dependence of the valence band spectra for single crystals shows the increases of the degeneracy in energy levels and of the interaction between Ce 4f and S 3p states. These results give insight into the nature of the CeO1-xFx layer and the microscopic coexistence of magnetism and superconductivity in CeO1-xFxBiS2.
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
8号
出版者 American Physical Society
開始ページ 085109
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.95.085109
Web of Sience KeyUT 000393501200003
関連URL isVersionOf https://doi.org/10.1103/PhysRevB.95.085109
著者 Terashima, Kensei| Sonoyama, Junki| Wakita, Takanori| Sunagawa, Masanori| Ono, Kanta| Kumigashira, Hiroshi| Muro, Takayuki| Nagao, Masanori| Watauchi, Satoshi| Tanaka, Isao| Okazaki, Hiroyuki| Takano, Yoshihiko| Miura, Osuke| Mizuguchi, Yoshikazu| Usui, Hidetomo| Suzuki, Katsuhiro| Kuroki, Kazuhiko| Muraoka, Yuji| Yokoya, Takayoshi|
発行日 2014-12-22
出版物タイトル Physical Review B
90巻
22号
資料タイプ 学術雑誌論文