Proximity to Fermi-surface topological change in superconducting LaO0.54F0.46BiS2

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

doi:10.1103/PhysRevB.90.220512

Permalink : https://ousar.lib.okayama-u.ac.jp/53418

ID	53418
フルテキストURL	PhysRevB.90.220512.pdf 2.19 MB
著者	Terashima, Kensei Graduate School of Natural Science and Technology and Research Laboratory for Surface Science, Okayama University Kaken ID publons researchmap Sonoyama, Junki Graduate School of Natural Science and Technology and Research Laboratory for Surface Science, Okayama University Wakita, Takanori Graduate School of Natural Science and Technology and Research Laboratory for Surface Science, Okayama University Kaken ID publons researchmap Sunagawa, Masanori Graduate School of Natural Science and Technology and Research Laboratory for Surface Science, Okayama University Ono, Kanta High Energy Accelerator Research Organization (KEK), Photon Factory Kumigashira, Hiroshi High Energy Accelerator Research Organization (KEK), Photon Factory Muro, Takayuki Japan Synchrtron Radiation Research Institute (JASRI)/SPring-8 Nagao, Masanori Center for Crystal Science and Technology, University of Yamanashi Watauchi, Satoshi Center for Crystal Science and Technology, University of Yamanashi Tanaka, Isao Center for Crystal Science and Technology, University of Yamanashi Okazaki, Hiroyuki National Institute for Materials Science Takano, Yoshihiko National Institute for Materials Science Miura, Osuke Department of Electrical and Electronic Engineering, Tokyo Metropolitan University Mizuguchi, Yoshikazu Department of Electrical and Electronic Engineering, Tokyo Metropolitan University Usui, Hidetomo Department of Physics, Osaka University Suzuki, Katsuhiro Department of Physics, Osaka University Kuroki, Kazuhiko Department of Physics, Osaka University Muraoka, Yuji Graduate School of Natural Science and Technology and Research Laboratory for Surface Science, Okayama University Kaken ID researchmap Yokoya, Takayoshi 1Graduate School of Natural Science and Technology and Research Laboratory for Surface Science ORCID Kaken ID publons researchmap
抄録	The electronic structure of nearly optimally doped novel superconductor LaO1−xFxBiS2(x = 0.46) was investigated using angle-resolved photoemission spectroscopy (ARPES). We clearly observed band dispersions from 2 to 6 eV binding energy and near the Fermi level (EF), which are well reproduced by first-principles calculations when the spin-orbit coupling is taken into account. The ARPES intensity map near EF shows a squarelike distribution around the (Z) point in addition to electronlike Fermi-surface (FS) sheets around the X(R) point, indicating that FS of LaO0.54F0.46BiS2 is in close proximity to the theoretically predicted topological change.
発行日	2014-12-22
出版物タイトル	Physical Review B
巻	90巻
号	22号
出版者	The American Physical Society
ISSN	1098-0121
資料タイプ	学術雑誌論文
オフィシャル URL	http://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.220512
言語	英語
著作権者	©2014 American Physical Society
論文のバージョン	publisher
査読	有り
DOI	10.1103/PhysRevB.90.220512
Web of Science KeyUT	000349553300001