Nature Communications (May 2018)

Large quantum-spin-Hall gap in single-layer 1T′ WSe2

  • P. Chen,
  • Woei Wu Pai,
  • Y.-H. Chan,
  • W.-L. Sun,
  • C.-Z. Xu,
  • D.-S. Lin,
  • M. Y. Chou,
  • A.-V. Fedorov,
  • T.-C. Chiang

DOI
https://doi.org/10.1038/s41467-018-04395-2
Journal volume & issue
Vol. 9, no. 1
pp. 1 – 7

Abstract

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The current known two-dimensional topological insulators with small band gaps limit the potential for room temperature applications. Here, Chen et al. observe a sizable gap of 129 meV in a 1T'-WSe2 single layer grown on bilayer graphene with in-gap edge state near the layer boundary.