Soft x-ray photoemission study of new BiS2-layered superconductor LaO1-xFxBiS2

Shinsuke Nagira, Junki Sonoyama, Takanori Wakita, Masanori Sunagawa, Yudai Izumi, Takayuki Muro, Hiroshi Kumigashira, Masaharu Oshima, Keita Deguchi, Hiroyuki Okazaki, Yoshihiko Takano, Osuke Miura, Yoshikazu Mizuguchi, Katsuhiro Suzuki, Hidetomo Usui, Kazuhiko Kuroki, Kozo Okada, Yuji Muraoka, Takayoshi Yokoya

    研究成果: Article査読

    21 被引用数 (Scopus)

    抄録

    We use core level and valence band soft X-ray photoemission spectroscopy (SXPES) to investigate the electronic structure of new BiS2 layered superconductor LaO1-xFxBiS2. The core level spectra of doped samples show a new spectral feature on the lower binding energy side of the Bi 4f main peak, which may be explained by core-hole screening with metallic states near the Fermi level (EF). The experimental electronic structure and its x dependence (a higher binding energy shift of the valence band as well as appearance of new states near EF having the dominant Bi 6p character) were found to be consistent with the predictions of band structure calculations in general. Noticeable deviation of the spectral shape of the states near EF from that of calculations might provide insight into interesting physical properties. This study provides the first experimental electronic structure of the new BiS2 layered superconductors.

    本文言語English
    論文番号033703
    ジャーナルjournal of the physical society of japan
    83
    3
    DOI
    出版ステータスPublished - 2014 3 15

    ASJC Scopus subject areas

    • 物理学および天文学(全般)

    フィンガープリント

    「Soft x-ray photoemission study of new BiS<sub>2</sub>-layered superconductor LaO<sub>1-x</sub>F<sub>x</sub>BiS<sub>2</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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