High-Temperature Majorana Corner States
High-Temperature Majorana Corner States
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高温马约拉纳角州
DOI：
10.1103/physrevlett.121.186801
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发表时间：
2018
影响因子：
8.6
通讯作者：
Zhang Fan
中科院分区：
文献类型：
--
作者：
Wang Qiyue;Liu Cheng-Cheng;Lu Yuan-Ming;Zhang Fan
马约拉纳束缚态经常出现在一维拓扑超导体的末端。通过一个新的体积不变量和一个直观的边缘参数进行验证，我们显示了一个Majorana Kramers对在一个正方形2D拓扑绝缘体的每个角上的出现（例如，Fe基）超导体。我们得到了一个相图，解决了晶体对称性和边缘取向的弛豫。我们提出了两个实验实现候选材料。我们的方案为探索非阿贝尔准粒子提供了一条更高阶、更高温度的途径。
Majorana bound states often occur at the end of a 1D topological superconductor. Validated by a new bulk invariant and an intuitive edge argument, we show the emergence of one Majorana Kramers pair at each corner of a square-shaped 2D topological insulator proximitized by an-wave (e.g., Fe-based) superconductor. We obtain a phase diagram that addresses the relaxation of crystal symmetry and edge orientation. We propose two experimental realizations in candidate materials. Our scheme offers a higher-order and higher-temperature route for exploring non-Abelian quasiparticles.