Z2fractionalized Chern/topological insulators in an exactly soluble correlated model

  title={Z2fractionalized Chern/topological insulators in an exactly soluble correlated model},
  author={Yin Xiao Zhong and Yufeng Wang and Hong-Gang Luo},
  journal={Physical Review B},
In this paper we propose an exactly soluble model in two-dimensional honeycomb lattice, from which two phases are found. One is the usual Chern/topological insulating state and the other is an interesting $Z_2$ fractionalized Chern/topological insulator. While their bulk properties are similar, the edge-states of physical electrons are quite different. The single electron excitation of the former shows a free particle-like behavior while the latter one is gapped, which provides a definite… Expand
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