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)

*This work was supported by ARO under Grant No. W911NF-18-1-0416 (Q. W. and F. Z.) and NSF under Grant No. DMR-1653769 (Y.-M. L.).

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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