拓扑绝缘体腔中霍尔电流的几何诱导反转
Geometrically induced reversion of Hall current in a topological insulator cavity
摘要：
在拓扑绝缘体表面附近的电荷感应出一个像磁势。在这里，我们表明，如果拓扑绝缘体表面有一个负曲率，即在半球形腔的情况下，感生霍尔电流反转其旋转的电荷穿过半球形几何焦点。这种反转被证明是相当于反转的图像磁粒子的电荷。我们还讨论了半圆柱腔的情况下，霍尔电流反转似乎是可行的探测在现实的实验。
英文摘要：
An electric charge near the surface of a topological insulator induces an image magnetic monopole. Here, we show that if the topological insulator surface has a negative curvature, namely in the case of a semispherical cavity, the induced Hall current reverses its rotation as the electric charge crosses the semisphere geometric focus. Such a reversion is shown to be equivalent of inverting the charge of the image magnetic monopole. We also discuss upon the case of a semicylindrical cavity, where Hall current reversion appears to be feasible of probing in realistic experiments.
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