Topological Phase Transitions in the Repulsively Interacting Haldane-Hubbard Model

Tutkimustuotos: Lehtiartikkeli

Tutkijat

Organisaatiot

  • Swiss Federal Institute of Technology Zurich
  • Institute for Quantum Electronics

Kuvaus

Using dynamical mean-field theory and exact diagonalization we study the phase diagram of the repulsive Haldane-Hubbard model, varying the interaction strength and the sublattice potential difference. In addition to the quantum Hall phase with Chern number C=2 and the band insulator with C=0 present already in the noninteracting model, the system also exhibits a C=0 Mott insulating phase, and a C=1 quantum Hall phase. We explain the latter phase by a spontaneous symmetry breaking where one of the spin components is in the Hall state and the other in the band insulating state.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli225305
Sivut1-6
JulkaisuPhysical Review Letters
Vuosikerta116
Numero22
TilaJulkaistu - 2 kesäkuuta 2016
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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