Electromagnetic response of topological superconductors
Electromagnetic response of topological superconductors
复制标题
拓扑超导体的电磁响应
DOI：
10.1103/physrevb.103.235427
复制
发表时间：
2021
影响因子：
3.7
通讯作者：
Hansson T. H.
中科院分区：
文献类型：
--
作者：
Stalhammar M.;Stone M.;Sato Masatoshi;Hansson T. H.
我们解决了3+1维拓扑超导体电磁响应的几个难题。特别是，我们通过分析计算表明，拓扑和正常的超导体之间的接口不表现出任何量子霍尔效应，只要时间反演不变性被保存。我们将此与拓扑绝缘体到正常绝缘体界面的类似情况进行对比。不同之处在于，在拓扑绝缘体中，电磁矢量势耦合到狄拉克质量理论中的矢量电流，而在超导体中，一对外尔费米子被马约拉纳质量带隙，电磁矢量势耦合到其轴向电流。
We resolve several puzzles related to the electromagnetic response of topological superconductors in 3+1 dimensions. In particular we show by an analytical calculation that the interface between a topological and normal superconductor does not exhibit any quantum Hall effect as long as time reversal invariance is preserved. We contrast this with the analogous case of a topological insulator to normal insulator interface. The difference is that in the topological insulator the electromagnetic vector potential couples to a vector current in a theory with a Dirac mass, while in the superconductor a pair of Weyl fermions is gapped by Majorana masses and the electromagnetic vector potential couples to its axial currents.