Proximity to Fermi-surface topological change in superconducting la O0.54 F0.46Bi S2

Kensei Terashima; Junki Sonoyama; Takanori Wakita; Masanori Sunagawa; Kanta Ono; Hiroshi Kumigashira; Takayuki Muro; Masanori Nagao; Satoshi Watauchi; Isao Tanaka; Hiroyuki Okazaki; Yoshihiko Takano; Osuke Miura; Yoshikazu Mizuguchi; Hidetomo Usui; Katsuhiro Suzuki; Kazuhiko Kuroki; Yuji Muraoka; Takayoshi Yokoya

doi:10.1103/PhysRevB.90.220512

Proximity to Fermi-surface topological change in superconducting la O0.54 F0.46Bi S2

Kensei Terashima, Junki Sonoyama, Takanori Wakita, Masanori Sunagawa, Kanta Ono, Hiroshi Kumigashira, Takayuki Muro, Masanori Nagao, Satoshi Watauchi, Isao Tanaka, Hiroyuki Okazaki, Yoshihiko Takano, Osuke Miura, Yoshikazu Mizuguchi, Hidetomo Usui, Katsuhiro Suzuki, Kazuhiko Kuroki, Yuji Muraoka, Takayoshi Yokoya

研究成果: Article › 査読

34 被引用数 (Scopus)

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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 Γ(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.

本文言語	English
論文番号	220512
ジャーナル	Physical Review B - Condensed Matter and Materials Physics
巻	90
号	22
DOI	https://doi.org/10.1103/PhysRevB.90.220512
出版ステータス	Published - 2014 12月 22

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
凝縮系物理学

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10.1103/PhysRevB.90.220512

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Terashima, K., Sonoyama, J., Wakita, T., Sunagawa, M., Ono, K., Kumigashira, H., Muro, T., Nagao, M., Watauchi, S., Tanaka, I., Okazaki, H., Takano, Y., Miura, O., Mizuguchi, Y., Usui, H., Suzuki, K., Kuroki, K., Muraoka, Y., & Yokoya, T. (2014). Proximity to Fermi-surface topological change in superconducting la O0.54 F0.46Bi S2. Physical Review B - Condensed Matter and Materials Physics, 90(22), [220512]. https://doi.org/10.1103/PhysRevB.90.220512

Terashima, K, Sonoyama, J, Wakita, T, Sunagawa, M, Ono, K, Kumigashira, H, Muro, T, Nagao, M, Watauchi, S, Tanaka, I, Okazaki, H, Takano, Y, Miura, O, Mizuguchi, Y, Usui, H, Suzuki, K, Kuroki, K, Muraoka, Y & Yokoya, T 2014, 'Proximity to Fermi-surface topological change in superconducting la O0.54 F0.46Bi S2', Physical Review B - Condensed Matter and Materials Physics, vol. 90, no. 22, 220512. https://doi.org/10.1103/PhysRevB.90.220512

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title = "Proximity to Fermi-surface topological change in superconducting la O0.54 F0.46Bi S2",

abstract = "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 Γ(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.",

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AU - Terashima, Kensei

AU - Sonoyama, Junki

AU - Wakita, Takanori

AU - Sunagawa, Masanori

AU - Ono, Kanta

AU - Kumigashira, Hiroshi

AU - Muro, Takayuki

AU - Nagao, Masanori

AU - Watauchi, Satoshi

AU - Tanaka, Isao

AU - Okazaki, Hiroyuki

AU - Takano, Yoshihiko

AU - Miura, Osuke

AU - Mizuguchi, Yoshikazu

AU - Usui, Hidetomo

AU - Suzuki, Katsuhiro

AU - Kuroki, Kazuhiko

AU - Muraoka, Yuji

AU - Yokoya, Takayoshi

PY - 2014/12/22

Y1 - 2014/12/22

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AB - 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 Γ(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.

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Proximity to Fermi-surface topological change in superconducting la O0.54 F0.46Bi S2

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