High-Temperature Majorana Corner States

ORAL

Abstract

Majorana bound states often occur at the end of a 1D topological superconductor. Validated by a new bulk invariant and an intuitive edge argument, we show the emergence of one Majorana Kramers pair at each corner of a square-shaped 2D topological insulator proximitized by an extended s-wave (e.g., Fe-based) superconductor. We obtain a phase diagram that addresses the relaxation of crystal symmetry and edge orientation. We propose two experimental realizations in candidate materials. Our scheme offers a higher-order and higher-temperature route for exploring non-Abelian quasiparticles. (arXiv:1804.04711, PRL 2018)

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Presenters

  • Qiyue Wang

    Department of Physics, University of Texas at Dallas

Authors

  • Qiyue Wang

    Department of Physics, University of Texas at Dallas

  • Cheng-Cheng Liu

    Beijing Key Laboratory of Nanophotonics and Ultrane Optoelectronic Systems, School of Physics, Beijing Institute of Technology, School of Physics, Beijing Institute of Technology, Beijing, China, School of Physics, Beijing Institute of Technology

  • Yuan-Ming Lu

    Ohio State University, Physics, Ohio State University, Physics, OSU, Department of Physics, Ohio State University, Department of Physics, The Ohio State University, Deaprtment of Physics, Ohio State University

  • Fan Zhang

    Department of Physics, The University of Texas at Dallas, University of Texas at Dallas, Department of Physics, University of Texas at Dallas