Optical tuning of Berry phase effect in topological insulators
Optical tuning of Berry phase effect in topological insulators
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DOI：
10.1016/j.jlumin.2010.11.007
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发表时间：
2011-03-01
影响因子：
3.6
通讯作者：
Inoue, Jun-ichi
中科院分区：
文献类型：
--
作者：
Inoue, Jun-ichi
我们从理论上讨论了驱动激光场对二维电子系统拓扑性质的影响，拓扑性质是电子贝里相效应的表现之一。圆偏振引起的激光振幅的绝热变化改变了时间反转对称性破缺的拓扑绝缘体中的“序参数”，称为陈数，从而导致光致相变。这一发现是整数量子霍尔效应的光学模拟，它是由激光场而不是磁场触发的。这种平行性表明圆偏振光和磁场之间的电子动力学效应相似。 (C) 2010 Elsevier B.V. 保留所有权利。
We theoretically discuss the influence of driving laser field on the topological nature, one of the manifestation of the electron Berry phase effect, in two-dimensional electronic systems. Adiabatic change of the laser amplitude with circular polarization alters the "order parameter", termed the Chern number, in topological insulator with broken time-reversal symmetry, resulting in photo-induced phase transition. The finding is an optical analog of the integer quantum Hall effect, that is triggered by the laser field instead of magnetic field. This parallelism suggests the similarity of effects to electron dynamics between circularly polarized light and magnetic field. (C) 2010 Elsevier B.V. All rights reserved.