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arXiv · 1101.4064

Quantum spin Hall effect induced by non-magnetic and magnetic staggered potentials

Huaiming Guo·Shiping Feng·Shun-Qing Shen
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Abstract

We have a comparative study of the quantum spin Hall (QSH) effects induced by non-magnetic and magnetic staggered potentials respectively and show that they have the same effect in driving the topological phase transition. The result implies that both time-reversal (${\cal T}$) preserving and breaking systems can host QSH effect. We also investigate the stability of the resulting QSH effect to disorder and find that for ${\cal T}$ invariant system the edge states are always robust while those of ${\cal T}$ breaking system are also robust if there is additional symmetry in the system.

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Huaiming Guo, Shiping Feng, Shun-Qing Shen. 2011-02-18. Quantum spin Hall effect induced by non-magnetic and magnetic staggered potentials. https://doi.org/10.1103/physrevb.83.045114

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