Topological Phase Transitions in the Repulsively Interacting Haldane-Hubbard Model
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Physical Review Letters, Volume 116, issue 22, pp. 1-6
Abstract
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.Description
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Vanhala, T I, Siro, T, Liang, L, Troyer, M, Harju, A & Törmä, P 2016, 'Topological Phase Transitions in the Repulsively Interacting Haldane-Hubbard Model', Physical Review Letters, vol. 116, no. 22, 225305, pp. 1-6. https://doi.org/10.1103/PhysRevLett.116.225305