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  • Title: Valley-polarized quantum anomalous Hall effect in silicene.
    Author: Pan H, Li Z, Liu CC, Zhu G, Qiao Z, Yao Y.
    Journal: Phys Rev Lett; 2014 Mar 14; 112(10):106802. PubMed ID: 24679320.
    Abstract:
    We find theoretically a new quantum state of matter-the valley-polarized quantum anomalous Hall state in silicene. In the presence of Rashba spin-orbit coupling and an exchange field, silicene hosts a quantum anomalous Hall state with Chern number C=2. We show that through tuning the Rashba spin-orbit coupling, a topological phase transition results in a valley-polarized quantum anomalous Hall state, i.e., a quantum state that exhibits the electronic properties of both the quantum valley Hall state (valley Chern number Cv=3) and quantum anomalous Hall state with C=-1. This finding provides a platform for designing dissipationless valleytronics in a more robust manner.
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