Interaction and filling-induced quantum anomalous Hall effect in Bose-Fermi mixture on hexagonal lattice

Details Interaction and filling-induced quantum anomalous Hall effect in Bose-Fermi mixture on hexagonal lattice Interaction and filling-induced quantum anomalous Hall effect in Bose-Fermi mixture on hexagonal lattice

2012-04-18

arxiv.org/abs/1204.4050v1

Physics

Condensed Matter

Quantum Gases

Scientific paper

We show that the quantum anomalous Hall effect can be realized by composite particles of Bose-Fermi mixture on the hexagonal lattice. The quantum anomalous Hall effect is driven by simply adding bosons to the mixture to form different composite particles in strong interspecies interaction limit, where composite particles have been generated experimentally [S. Sugawa {\sl et al.}, Nature Physics {\bf 7}, 642 (2011)]. When the filling of the bosons is larger than the critical value, the gapless spectrum opens a finite gap at the Dirac points, the quantum anomalous Hall effect or charge density wave state is formed. The realization and the detection of the quantum anomalous Hall effect is compatible with current experimental technology.

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