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arXiv 1010.0187cond-mat.mes-hall
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螺旋Aharonov-Casher边缘态

Helical Aharonov-Casher edge states

J. J. Heremans, L. L. Xu

摘要:

结果表明,在二维几何中的Aharonov-Casher矢量势可以导致螺旋边缘态。Aharonov-Casher矢量势是磁矢量势的电磁对偶,并导致类似于整数量子霍尔效应的在样品边缘处的旅行状态。螺旋边缘态被预测出现在一个狭窄的通道几何与抛物线或充分对称的限制势。螺旋Aharonov-Casher边缘状态和实验考虑在特定的材料系统的影响进行了讨论。

英文摘要:

It is shown that an Aharonov-Casher vector potential in a two-dimensional geometry can lead to helical edge states. The Aharonov-Casher vector potential is the electromagnetic dual of the magnetic vector potential, and leads to traveling states at the sample edge in analogy to the integer quantum Hall effect. The helical edge states are predicted to appear in a narrow channel geometry with parabolic or sufficiently symmetric confinement potential. The implications of the helical Aharonov-Casher edge states and experimental considerations in specific materials systems are discussed.

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