Topological Phase Transitions in the Repulsively Interacting Haldane-Hubbard Model

被引：77

作者：

Vanhala, Tuomas I. ^{[1
,2
]}

Siro, Topi ^{[1
]}

Liang, Long ^{[1
]}

Troyer, Matthias ^{[2
]}

Harju, Ari ^{[1
]}

Torma, Paivi ^{[1
,3
]}

机构：

[1] Aalto Univ, Dept Appl Phys, COMP Ctr Excellence, Helsinki, Finland

[2] ETH, Theoret Phys, CH-8093 Zurich, Switzerland

[3] ETH, Inst Quantum Elect, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2016年 / 116卷 / 22期

基金：

瑞士国家科学基金会; 欧洲研究理事会; 芬兰科学院;

关键词：

SQUARE LATTICE; SPIN LIQUID; MONTE-CARLO; QUANTUM; REALIZATION;

D O I：

10.1103/PhysRevLett.116.225305

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：6

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