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• W2271726647 abstract "We propose a general scheme for diagnosing interaction-driven topological phases in the weak interaction regime using exact diagonalization (ED). The scheme comprises the analysis of eigenvalues of the point-group operators for the many-body eigenstates and the correlation functions for physical observables to extract the symmetries of the order parameters and the topological numbers of the underlying ground states at the thermodynamic limit from a relatively small size system afforded by ED. As a concrete example, we investigate the interaction effects on the half-filled spinless fermions on the checkerboard lattice with a quadratic band crossing point. Numerical results support the existence of a spontaneous quantum anomalous Hall phase purely driven by a nearest-neighbor weak repulsive interaction, separated from a nematic Mott insulator phase at strong repulsive interaction by a first-order phase transition." @default.
• W2271726647 created "2016-06-24" @default.
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• W2271726647 date "2016-08-05" @default.
• W2271726647 modified "2023-10-18" @default.
• W2271726647 title "Diagnosis of Interaction-driven Topological Phase via Exact Diagonalization" @default.
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• W2271726647 doi "https://doi.org/10.1103/physrevlett.117.066403" @default.
• W2271726647 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/27541471" @default.
• W2271726647 hasPublicationYear "2016" @default.
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