Comparative ARPES studies of LaOxF1-xBiS2 (x = 0.23 and 0.46)

Kensei Terashima; T. Wakita; M. Sunagawa; H. Fujiwara; T. Nagayama; K. Ono; H. Kumigashira; M. Nagao; S. Watauchi; I. Tanaka; H. Okazaki; Y. Takano; Y. Mizuguchi; H. Usui; K. Kuroki; Y. Muraoka; T. Yokoya

doi:10.1088/1742-6596/683/1/012002

Comparative ARPES studies of LaO_xF_1-xBiS₂ (x = 0.23 and 0.46)

Kensei Terashima, T. Wakita, M. Sunagawa, H. Fujiwara, T. Nagayama, K. Ono, H. Kumigashira, M. Nagao, S. Watauchi, I. Tanaka, H. Okazaki, Y. Takano, Y. Mizuguchi, H. Usui, K. Kuroki, Y. Muraoka, T. Yokoya

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

Abstract

BiS₂-based layered superconductors are new superconductors, having been paid special attention due to the layered crystal structure and the characteristic electronic structure that can lead to exotic mechanism of superconductivity as well as cooperation of superconductivity and ordered phases. In this article, we report valence band dispersions and Fermi surface topology of LaO_1-xF_xBiS₂ (x = 0.23, T_c < 2 K) studied by angle-resolved photoemission spectroscopy, and compared them with those of LaO_1-xF_xBiS₂ (x = 0.46, T_c = 3.1 K). We discuss experimental x dependent electronic structures and its relation to T_c. We also point to anomalous spectroscopic features in LaO_1-xF_xBiS₂ (x = 0.46) that can be explained by band structure calculations considering distorted lattice, suggesting role of dynamical or static lattice distortion to the physical properties.

Original language	English
Article number	012002
Journal	Journal of Physics: Conference Series
Volume	683
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/683/1/012002
Publication status	Published - Feb 5 2016
Event	TMU International Symposium on New Quantum Phases Emerging from Novel Crystal Structure - Tokyo, Japan Duration: Sept 24 2015 → Sept 25 2015

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1088/1742-6596/683/1/012002

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Terashima, K., Wakita, T., Sunagawa, M., Fujiwara, H., Nagayama, T., Ono, K., Kumigashira, H., Nagao, M., Watauchi, S., Tanaka, I., Okazaki, H., Takano, Y., Mizuguchi, Y., Usui, H., Kuroki, K., Muraoka, Y., & Yokoya, T. (2016). Comparative ARPES studies of LaO_xF_1-xBiS₂ (x = 0.23 and 0.46). Journal of Physics: Conference Series, 683(1), Article 012002. https://doi.org/10.1088/1742-6596/683/1/012002

Terashima, K, Wakita, T, Sunagawa, M, Fujiwara, H, Nagayama, T, Ono, K, Kumigashira, H, Nagao, M, Watauchi, S, Tanaka, I, Okazaki, H, Takano, Y, Mizuguchi, Y, Usui, H, Kuroki, K, Muraoka, Y & Yokoya, T 2016, 'Comparative ARPES studies of LaO_xF_1-xBiS₂ (x = 0.23 and 0.46)', Journal of Physics: Conference Series, vol. 683, no. 1, 012002. https://doi.org/10.1088/1742-6596/683/1/012002

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title = "Comparative ARPES studies of LaOxF1-xBiS2 (x = 0.23 and 0.46)",

abstract = "BiS2-based layered superconductors are new superconductors, having been paid special attention due to the layered crystal structure and the characteristic electronic structure that can lead to exotic mechanism of superconductivity as well as cooperation of superconductivity and ordered phases. In this article, we report valence band dispersions and Fermi surface topology of LaO1-xFxBiS2 (x = 0.23, Tc < 2 K) studied by angle-resolved photoemission spectroscopy, and compared them with those of LaO1-xFxBiS2 (x = 0.46, Tc = 3.1 K). We discuss experimental x dependent electronic structures and its relation to Tc. We also point to anomalous spectroscopic features in LaO1-xFxBiS2 (x = 0.46) that can be explained by band structure calculations considering distorted lattice, suggesting role of dynamical or static lattice distortion to the physical properties.",

author = "Kensei Terashima and T. Wakita and M. Sunagawa and H. Fujiwara and T. Nagayama and K. Ono and H. Kumigashira and M. Nagao and S. Watauchi and I. Tanaka and H. Okazaki and Y. Takano and Y. Mizuguchi and H. Usui and K. Kuroki and Y. Muraoka and T. Yokoya",

note = "Funding Information: This work was partially supported by JSPS KAKENHI Grant Numbers 25800205 and 15H03691. This work was also partially supported by the Program for Promoting the Enhancement of Research Universities from MEXT. Publisher Copyright: {\textcopyright} Published under licence by IOP Publishing Ltd.; TMU International Symposium on New Quantum Phases Emerging from Novel Crystal Structure ; Conference date: 24-09-2015 Through 25-09-2015",

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T1 - Comparative ARPES studies of LaOxF1-xBiS2 (x = 0.23 and 0.46)

AU - Terashima, Kensei

AU - Wakita, T.

AU - Sunagawa, M.

AU - Fujiwara, H.

AU - Nagayama, T.

AU - Ono, K.

AU - Kumigashira, H.

AU - Nagao, M.

AU - Watauchi, S.

AU - Tanaka, I.

AU - Okazaki, H.

AU - Takano, Y.

AU - Mizuguchi, Y.

AU - Usui, H.

AU - Kuroki, K.

AU - Muraoka, Y.

AU - Yokoya, T.

N1 - Funding Information: This work was partially supported by JSPS KAKENHI Grant Numbers 25800205 and 15H03691. This work was also partially supported by the Program for Promoting the Enhancement of Research Universities from MEXT. Publisher Copyright: © Published under licence by IOP Publishing Ltd.

PY - 2016/2/5

Y1 - 2016/2/5

N2 - BiS2-based layered superconductors are new superconductors, having been paid special attention due to the layered crystal structure and the characteristic electronic structure that can lead to exotic mechanism of superconductivity as well as cooperation of superconductivity and ordered phases. In this article, we report valence band dispersions and Fermi surface topology of LaO1-xFxBiS2 (x = 0.23, Tc < 2 K) studied by angle-resolved photoemission spectroscopy, and compared them with those of LaO1-xFxBiS2 (x = 0.46, Tc = 3.1 K). We discuss experimental x dependent electronic structures and its relation to Tc. We also point to anomalous spectroscopic features in LaO1-xFxBiS2 (x = 0.46) that can be explained by band structure calculations considering distorted lattice, suggesting role of dynamical or static lattice distortion to the physical properties.

AB - BiS2-based layered superconductors are new superconductors, having been paid special attention due to the layered crystal structure and the characteristic electronic structure that can lead to exotic mechanism of superconductivity as well as cooperation of superconductivity and ordered phases. In this article, we report valence band dispersions and Fermi surface topology of LaO1-xFxBiS2 (x = 0.23, Tc < 2 K) studied by angle-resolved photoemission spectroscopy, and compared them with those of LaO1-xFxBiS2 (x = 0.46, Tc = 3.1 K). We discuss experimental x dependent electronic structures and its relation to Tc. We also point to anomalous spectroscopic features in LaO1-xFxBiS2 (x = 0.46) that can be explained by band structure calculations considering distorted lattice, suggesting role of dynamical or static lattice distortion to the physical properties.

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Comparative ARPES studies of LaO_xF_1-xBiS₂ (x = 0.23 and 0.46)

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