articleNature CommunicationsApr 25, 2022GOLD OA

Rich nature of Van Hove singularities in Kagome superconductor CsV3Sb5

YHYong HuXWXianxin WuBRBrenden R. OrtizSJSailong JuXHXinloong Han

Paul Scherrer Institute · Chinese Academy of Sciences · +10 more institutions

PubMed
Indexed inarxivcrossrefdoajpubmed

Abstract

Abstract The recently discovered layered kagome metals AV 3 Sb 5 (A = K, Rb, Cs) exhibit diverse correlated phenomena, which are intertwined with a topological electronic structure with multiple van Hove singularities (VHSs) in the vicinity of the Fermi level. As the VHSs with their large density of states enhance correlation effects, it is of crucial importance to determine their nature and properties. Here, we combine polarization-dependent angle-resolved photoemission spectroscopy with density functional theory to directly reveal the sublattice properties of 3d -orbital VHSs in CsV 3 Sb 5 . Four VHSs are identified around the M point and three of them are close to the Fermi level, with two having…

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Topics & keywords

Topics
Keywords
  • Condensed matter physics
  • Physics
  • Van Hove singularity
  • Fermi level
  • Photoemission spectroscopy
  • Electronic structure
  • Density of states
  • Density functional theory
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