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

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

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.

Original language	English
Article number	220512
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	90
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.90.220512
Publication status	Published - Dec 22 2014

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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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.",

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

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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

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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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