Hourglass fermion surface states in stacked topological insulators with nonsymmorphic symmetry

  title={Hourglass fermion surface states in stacked topological insulators with nonsymmorphic symmetry},
  author={Motohiko Ezawa},
  journal={Physical Review B},
  • M. Ezawa
  • Published 1 July 2016
  • Physics
  • Physical Review B
Recently, a nonsymmorphic topological insulator was predicted, where the characteristic feature is the emergence of an ``hourglass fermion'' surface state protected by the nonsymmorphic symmetry. This prediction was supported soon after by the angle-resolved photoemission spectroscopy. We propose a simple model possessing the hourglass fermion surface state. The model is constructed by stacking the quantum spin Hall insulators with the interlayer coupling introduced so as to preserve the… Expand

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