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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 (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.

Journal

  • Physical Review B

    Physical Review B 90(22), 2014-12-22

    The American Physical Society

Codes

  • NII Article ID (NAID)
    120005606106
  • Text Lang
    ENG
  • Article Type
    journal article
  • ISSN
    1098-0121
  • Data Source
    IR 
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