Bilayer Haldane model: From trivial band insulator to fractionalized quantum anomalous Hall insulator

Article

关键词: CHIRAL SPIN STATES;    TOPOLOGICAL INSULATORS;   

DOI  :  10.1103/PhysRevB.98.125145

来源: SCIE

【 摘 要 】

Motivated by work on the bulk topological proximity effect and the topological bootstrap, we consider two coupled layers of quantum anomalous Hall (QAH) insulators with opposite signs of time-reversal breaking, which leads to a trivial band insulator at half-filling. We study the impact of interactions in this model within slave rotor theory, which leads to a layer-selective Mott transition, resulting in a fractionalized quantum anomalous Hall insulator QAH* where a Chern band insulator coexists with a chiral spin liquid. We also compute the edge electron spectral function in the vicinity of the QAH* phase.

【 授权许可】

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