Gate-tunable imbalanced Kane-Mele model in encapsulated bilayer jacutingaite

  title={Gate-tunable imbalanced Kane-Mele model in encapsulated bilayer jacutingaite},
  author={Louk Rademaker and Marco Gibertini},
  journal={arXiv: Mesoscale and Nanoscale Physics},
We study free, capped and encapsulated bilayer jacutingaite Pt\2HgSe\3 from first principles. While the free standing bilayer is a large gap trivial insulator, we find that the encapsulated structure has a small trivial gap due to the competition between sublattice symmetry breaking and sublattice-dependent next-nearest-neighbor hopping. Upon the application of a small perpendicular electric field, the encapsulated bilayer undergoes a topological transition towards a quantum spin Hall insulator… 
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