Possible observation of topological surface states in a d-electron Kondo Insulator with angle-resolved photoemission spectroscopy

ORAL

Abstract

We use angle-resolved photoemission to probe the low energy bands of a d-electron Kondo Insulator exhibiting many similar properties as the prototypical f-electron topological kondo insulator candidate SmB6. We find a set of fermi surface features that disperse across Ef, despite the bulk being insulating. Photon energy dependence shows the 2D nature of these bands. We discuss similarity and differences to SmB6 and open questions that challenges the current understanding of strongly correlated topological insulators.

*We acknowledge support from DOE/BES, Moore foundation, and NSF

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Presenters

  • Kejun Xu

    • Stanford University
    • SLAC National Accelerator Laboratory
    • Applied physics, Stanford University

Authors

  • Kejun Xu

    • Stanford University
    • SLAC National Accelerator Laboratory
    • Applied physics, Stanford University

  • Yu He

    • Stanford University
    • SLAC National Accelerator Laboratory
    • Applied physics, Stanford University
    • Department of Applied Physics, Stanford University

  • Sudi Chen

    • Stanford University
    • SLAC National Accelerator Laboratory
    • Applied physics, Stanford University

  • Makoto Hashimoto

    • SLAC
    • SLAC national accelerator laboratory
    • SLAC National Accelerator Laboratory
    • Stanford University
    • SSRL, SLAC

  • Donghui Lu

    • SLAC National Accelerator Laboratory, Stanford University
    • SLAC national accelerator laboratory
    • SLAC
    • SSRL, SLAC
    • Stanford University
    • SLAC National Accelerator Laboratory

  • Sung-Kwan Mo

    • ALS
    • Lawrence Berkeley National Laboratory
    • Lawrance Berkeley National Laboratory
    • Lawrence Berkeley Nat. Lab
    • Advanced Light Source, Lawrence Berkeley National Laboratory

  • Zhixun Shen

    • Stanford University
    • SLAC National Accelerator Laboratory
    • SIMES, SLAC National Accelerator Lab
    • GLAM, Stanford University
    • Applied physics, Stanford University
    • Department of Applied Physics, Stanford University