Observation of topological electronic structure in quasi-1D superconductor TaSe<sub>3</sub>

ORAL

Abstract

Topological superconductors (TSCs)，with the capability to host Majorana bound states that can lead to non-Abelian statistics and application in quantum computation，have been one of the most intensively studied topics in condensed matter physics recently. Up to date, only a few compounds have been proposed as candidates of intrinsic TSCs, such as doped topological insulator CuxBi2Se3 and iron-based superconductor FeTe0.55Se0.45. Here, by carrying out synchrotron and laser based angle-resolved photoemission spectroscopy (ARPES), we systematically investigated the electronic structure of a quasi-1D superconductor TaSe3, and identified the nontrivial topological surface states. In addition, our scanning tunneling microscopy (STM) study revealed a clean cleaved surface with a persistent superconducting gap, proving it suitable for further investigation of potential Majorana modes. These results prove TaSe3 as a stoichiometric TSC candidate that is stable and exfoliable, therefore a great platform for the study of rich novel phenomena and application potentials.

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Presenters

  • Zhongkai Liu

    • ShanghaiTech University

Authors

  • Zhongkai Liu

    • ShanghaiTech University

  • Cheng Chen

    • ShanghaiTech University

  • Aiji Liang

    • ShanghaiTech University

  • Shuai Liu

    • ShanghaiTech University

  • Si-Min Nie

    • Stanford Univ
    • Institute of Physics, Chinese Academy of Sciences
    • Stanford University

  • Junwei Huang

    • Nanjing University
    • Nanjing Univ

  • Meixiao Wang

    • ShanghaiTech University

  • Yiwei Li

    • Unviersity of Oxford

  • Ding Pei

    • Unviersity of Oxford

  • Haifeng Yang

    • ShanghaiTech University

  • Hui-Jun Zheng

    • ShanghaiTech University

  • yong zhang

    • ShanghaiTech University

  • Donghui Lu

    • SLAC - Natl Accelerator Lab
    • SLAC National Accelerator Laboratory, Stanford Synchrotron Radiation Lightsource
    • SLAC
    • Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory
    • SLAC National Accelerator Laboratory,
    • SLAC National Accelerator Laboratory

  • Makoto Hashimoto

    • SLAC - Natl Accelerator Lab
    • SLAC National Accelerator Laboratory, Stanford Synchrotron Radiation Lightsource
    • SLAC
    • Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory
    • SLAC National Accelerator Laboratory,
    • SLAC National Accelerator Laboratory

  • Alexei Barinov

    • Elettra Sincrotrone

  • Chris Jozwiak

    • Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
    • Lawrence Berkeley National Laboratory
    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Advanced Light Source
    • Advanced Light Source, Lawrence Berkeley National Lab

  • Aaron Bostwick

    • Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Advanced Light Source
    • Advanced Light Source, Lawrence Berkeley National Lab

  • Eli Rotenberg

    • Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
    • Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Lab, Advanced Light Source
    • Advanced Light Source, Lawrence Berkeley National Laboratory
    • Advanced Light Source
    • Advanced Light Source, Lawrence Berkeley National Lab
    • LBNL

  • Xufeng Kou

    • ShanghaiTech University

  • Lexian Yang

    • Tsinghua University

  • Yanfeng Guo

    • ShanghaiTec Univ
    • ShanghaiTech University

  • Zhijun Wang

    • Chinese Academy of Sciences

  • Hongtao Yuan

    • Nanjing University
    • Nanjing Univ

  • Yulin Chen

    • School of Physical Science and Technology, ShanghaiTech University
    • Department of Physics, University of Oxford
    • University of Oxford
    • Unviersity of Oxford