Gate-Accessible Superconductivity and Helical Modes in Monolayer WTe<sub>2</sub>

ORAL

Abstract

I report on our transport measurements of electrostatically gated monolayer tungsten ditelluride (WTe2), where we observe both superconductivity and helical edge modes in the same material. I will briefly introduce our experiments in the undoped regime which indicate that monolayer WTe2 is a quantum spin Hall insulator with edge conduction dominating up to 100K. In the doped regime, the same material is a superconductor at record-low induced 2D carrier densities, with critical temperatures as high as 1 Kelvin. Unique among 2D electronic systems, monolayer WTe2 is fully tunable from a gapped topological insulator state to an intrinsic superconducting state using only solid state electrostatic gates. New routes for topological quantum devices are now possible, in which electrostatically accessible superconductivity and helical modes can be naturally interfaced within the same crystal.

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Presenters

  • Valla Fatemi

    • Massachusetts Inst of Tech-MIT
    • Massachusetts Institute of Technology

Authors

  • Valla Fatemi

    • Massachusetts Inst of Tech-MIT
    • Massachusetts Institute of Technology

  • Sanfeng Wu

    • Massachusetts Inst of Tech-MIT
    • Massachusetts Institute of Technology
    • Massachusetts Institute of Technology-MIT

  • Yuan Cao

    • Massachusetts Inst of Tech-MIT

  • Quinn Gibson

    • Princeton University
    • Princeton Univ

  • Kenji Watanabe

    • National Institute for Materials Science
    • NIMS
    • National Institute for Material Science
    • Advanced Materials Laboratory, National Institute for Materials Science
    • National Institute of Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science
    • National Institute for Materials Science (NIMS
    • Advanced Materials Laboratory, NIMS
    • National Institute for Materials Science, Advanced Materials Laboratory
    • National Institue for Materials Science
    • National Institute of Material Science
    • National Institute for Matericals Science
    • Advanced Materials Laboratory
    • National Institute for Materials Science, 1-1 Namiki
    • Advanced materials laboratory, National institute for Materials Science
    • NIMS-Japan

  • Takashi Taniguchi

    • National Institute for Materials Science
    • NIMS
    • National Institute for Material Science
    • Advanced Materials Laboratory, National Institute for Materials Science
    • National Institute of Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science
    • National Institute for Materials Science (NIMS
    • Advanced Materials Laboratory, NIMS
    • National Institute for Materials Science, Advanced Materials Laboratory
    • National Institue for Materials Science
    • National Institute of Material Science
    • National Institute for Matericals Science
    • Advanced Materials Laboratory
    • National Institute for Materials Science, 1-1 Namiki
    • NIMS-Japan

  • Robert Cava

    • Department of Chemistry, Princeton University
    • Princeton
    • Princeton University
    • Chemistry, Princeton Univ
    • Princeton Univ

  • Pablo Jarillo-Herrero

    • Massachusetts Inst of Tech-MIT
    • Department of Physics, Massachusetts Institute of Technology
    • Physics, MIT
    • MIT
    • Massachusetts Institute of Technology