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

Kensei Terashima, Takanori 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, Yuji Muraoka, Takayoshi Yokoya

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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.

Original languageEnglish
Article number012002
JournalJournal of Physics: Conference Series
Volume683
Issue number1
DOIs
Publication statusPublished - Feb 5 2016

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superconductivity
electronic structure
Fermi surfaces
photoelectric emission
topology
physical properties
valence
crystal structure
spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Comparative ARPES studies of LaOxF1-xBiS2 (x = 0.23 and 0.46). / Terashima, Kensei; Wakita, Takanori; 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, Yuji; Yokoya, Takayoshi.

In: Journal of Physics: Conference Series, Vol. 683, No. 1, 012002, 05.02.2016.

Research output: Contribution to journalArticle

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 LaOxF1-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
Terashima, Kensei ; Wakita, Takanori ; 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, Yuji ; Yokoya, Takayoshi. / Comparative ARPES studies of LaOxF1-xBiS2 (x = 0.23 and 0.46). In: Journal of Physics: Conference Series. 2016 ; Vol. 683, No. 1.
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