Weyl-Majorana 螺线管
介观与纳米尺度物理
2017-02-23 v3 超导电性
摘要
具有轴向磁化的 Weyl 半金属线拥有沿其周边缠绕的金属表面态（费米弧），连接具有相反拓扑电荷（Berry曲率）的体 Weyl 锥。我们通过确定沿该线传播的表面模式的色散关系，研究了当该线被超导体覆盖时这一“Weyl 螺线管”会发生什么。与超导体的耦合将费米弧分裂为一对 Majorana 模式，以能隙相隔。沿该线改变耦合强度会出现能隙反演，从而囚禁 Majorana 费米子。
引用
@article{arxiv.1608.03160,
title = {Weyl-Majorana solenoid},
author = {P. Baireuther and J. Tworzydło and M. Breitkreiz and I. Adagideli and C. W. J. Beenakker},
journal= {arXiv preprint arXiv:1608.03160},
year = {2017}
}
备注
6 pages, 6 figures; V2: added discussion of charge operator, updated figures; V3: added a section on analytical mode-matching calculations, an appendix, and three new figures. To be published in the Focus Issue on "Topological semimetals" of New Journal of Physics