Charge Induction and Polarization on the Surface of a Topological Insulator Due to an Emergent Gauge Field
Charge Induction and Polarization on the Surface of a Topological Insulator Due to an Emergent Gauge Field
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DOI：
10.7566/jpsj.83.034704
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发表时间：
2014-02
影响因子：
1.7
通讯作者：
K. Hattori
中科院分区：
文献类型：
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作者：
K. Hattori
交换相互作用与表面磁化对存在于拓扑绝缘体（TI）表面的狄拉克费米子施加局部U(1)规范场。我们证明了涌现规范场通过量子反常霍尔（QAH）效应在TI表面产生电荷感应和极化。这些现象对应于劳克林思想实验的实现[R]。B.劳克林，物理学家。Rev. B 23, 5632(1981)]，无需插入磁通量，并能够在特定TI表面上局部评估QAH输运。
Exchange interaction with surface magnetization exerts a local U(1) gauge field on Dirac fermions that exist on the surface of a topological insulator (TI). We show that the emergent gauge field gives rise to charge induction and polarization on the TI surface via the quantum anomalous Hall (QAH) effect. These phenomena correspond to an implementation of the Laughlin’s thought experiment [R. B. Laughlin, Phys. Rev. B 23, 5632 (1981)] without inserting a magnetic flux, and enable a local evaluation of the QAH transport on a specific TI surface.