Quantum phase transitions of topological insulators without gap closing.

  title={Quantum phase transitions of topological insulators without gap closing.},
  author={S. Rachel},
  journal={Journal of physics. Condensed matter : an Institute of Physics journal},
  volume={28 40},
  • S. Rachel
  • Published 2016
  • Physics, Medicine
  • Journal of physics. Condensed matter : an Institute of Physics journal
We consider two-dimensional Chern insulators and time-reversal invariant topological insulators and discuss the effect of perturbations breaking either particle-number conservation or time-reversal symmetry. The appearance of trivial mass terms is expected to cause quantum phase transitions into trivial phases when such a perturbation overweighs the topological term. These phase transitions are usually associated with a bulk-gap closing. In contrast, the chiral Chern insulator is unaffected by… Expand

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