Quantum spin Hall effect in a two-orbital model on a honeycomb lattice

Satoru Hayami, Hiroaki Kusunose, Yukitoshi Motome

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3 Citations (Scopus)


The spin Hall effect is investigated in a two-orbital tight-binding model on a honeycomb lattice. We show that the model exhibits three topologically-different insulating phases at half filling, which are distinguished by different quantized values of the spin Hall conductivity. We analytically determine the phase boundaries, where the valence and conduction bands touch with each other with forming the Dirac nodes at the Fermi level. The results are discussed in terms of the effective antisymmetric spin-orbit coupling. The relation to the Kane- Mele model and implications for a magnetoelectric effect are also discussed.

Original languageEnglish
Article number012131
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2014
Event2014 International Conference on Strongly Correlated Electron Systems, SCES 2014 - Grenoble, France
Duration: 7 Jul 201414 Jul 2014

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