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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