Suppression of topological Mott-Hubbard phases by multiple charge orders in the honeycomb extended Hubbard model

  title={Suppression of topological Mott-Hubbard phases by multiple charge orders in the honeycomb extended Hubbard model},
  author={Mario Bijelic and Ryui Kaneko and Claudius Gros and Roser Valent'i},
  journal={Physical Review B},
We investigate the competition between charge-density-wave (CDW) states and a Coulomb interaction-driven topological Mott insulator (TMI) in the honeycomb extended Hubbard model. For the spinful model with on-site ($U$) and next-nearest-neighbor ($V_2$) Coulomb interactions at half filling, we find two peculiar six-sublattice charge-density-wave insulating states by using variational Monte Carlo simulations as well as the Hartree-Fock approximation. We observe that conventional ordered states… 
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