Crystal structure and electronic structure of non-centrosymmetrical trigonal PtBi2

ORAL

Abstract

Electronic structure of single crystalline γ-PtBi2 is studied by angle-resolved photoemission spectroscopy(ARPES). It is proposed by theoretical calculation that the stable structure of γ-PtBi2 should be non-centrosymmetric. ARPES measurement gives powerful evidences in this paper that different band structures between two types of cleaved surface are clearly observed. Bulk and surface bands are characterized through systematically photon dependent measurement. The bulk band dispersions agree well with the first-principle calculation except Rashba shaped surface states. The topography studied by STM also confirms the existence of two different cleaved surfaces. Besides, some efforts has been made to demonstrate the existence of triply degenerate point fermions.

–

Presenters

  • Wenxiang Jiang

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

Authors

  • Wenxiang Jiang

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

  • Fengfeng Zhu

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

  • Ping Li

    Department of Physics and Astronomy, Shanghai Jiao Tong University

  • Haiyang Ma

    Department of Physics and Astronomy, Shanghai Jiao Tong University

  • Haohua Sun

    Department of Physics and Astronomy, Shanghai Jiao Tong University

  • Zhongqiang Yang

    Department of Physics and Astronomy, Shanghai Jiao Tong University

  • Canhua Liu

    Department of Physics and Astronomy, Shanghai Jiao Tong University

  • Dandan Guan

    Shanghai Jiaotong University, Department of Physics and Astronomy, Shanghai Jiao Tong University

  • Jinfeng Jia

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

  • Weidong Luo

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

  • Dong Qian

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