Topological Phase Transitions in the Repulsively Interacting Haldane-Hubbard Model
Topological Phase Transitions in the Repulsively Interacting Haldane-Hubbard Model
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 …