A toy model for quantum spin Hall effect

作者：Owerre S A^*; Nsofini J

来源：Solid State Communications, 2015, 218: 35-39.

DOI：10.1016/j.ssc.2015.06.007

• Topological insulators
• Quantum spin Hall effect
• Landau levels
• Topological phase transitions

In this communication, we investigate a toy model of three-dimensional topological insulator surface, coupled homogeneously to a fictitious pseudospin-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.

• 出版日期2015-9