Evidence for edge states in trigonal layered PtBi2

ORAL

Abstract

PtBi2 is predicted to be a 3D topological semimetal which possesses triply degenerate point close to Fermi level. Here, we observe that unpredicted edge states exist at the edge of PtBi2 using scanning tunneling microscopy at 4.2K. More importantly, due to the inversion symmetry breaking, PtBi2 features two inequivalent top and bottom surfaces. We detect the edge states at the step edges on both surfaces.
Our experiment results, together with calculations, reveal the interesting physics of monolayer PtBi2.

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Presenters

  • Xiaoang Nie

    Shanghai Jiao Tong University

Authors

  • Xiaoang Nie

    Shanghai Jiao Tong University

  • Youguo Shi

    Institute of Physics, Chinese Academy of Sciences, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Chinese Academy of Sciences, Institute of Physics

  • Hao Zheng

    School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai Jiao Tong University

  • Jinfeng Jia

    shanghai jiao tong university, Shanghai Jiao Tong University, Department of Physics and Astronomy, Shanghai Jiao Tong University