期刊
PHYSICAL REVIEW B
卷 99, 期 12, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.99.125138
关键词
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资金
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [277974659, FOR 2414]
We study transport properties and topological phase transition in two-dimensional interacting disordered systems. We derive the Hall conductance within real-space dynamical mean-field theory, which is quantized and serves as a topological invariant for insulators, even when the energy gap is closed by localized states. In the spinful Harper-Hofstadter-Hatsugai model, in the trivial insulator regime, we find that the repulsive on-site interaction can assist weak disorder to induce the integer quantum Hall effect, while in the topologically nontrivial regime, it impedes Anderson localization. Generally, the interaction broadens the regime of the topological phase in the disordered system.
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