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A toy model for quantum spin Hall effect (1501.02643v9)
Published 12 Jan 2015 in cond-mat.mes-hall and cond-mat.other
Abstract: In this Communication, we investigate a toy model of three-dimensional topological insulator surface, coupled homogeneously to a fictitious pseudo spin-$\frac{1}{2}$ particle. We show that this toy model captures the interesting features of topological insulator surface states, which include topological quantum phase transition and quantum spin hall effect. We further incorporate an out-of-plane magnetic field and obtain the Landau levels.
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