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  • Title: Quantum anomalous Hall insulator of composite fermions.
    Author: Zhang Y, Shi J.
    Journal: Phys Rev Lett; 2014 Jul 04; 113(1):016801. PubMed ID: 25032931.
    Abstract:
    We show that a weak hexagonal periodic potential can transform a two-dimensional electron gas with an even-denominator magnetic filling factor into an quantum anomalous hall insulator of composite fermions, giving rise to the fractionally quantized Hall effect. The system provides a realization of the Haldane honeycomb-net model, albeit in a composite fermion system. We further propose a trial wave function for the state, and numerically evaluate its relative stability against the competing Hofstadter state. Possible sets of experimental parameters are proposed.
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