Time-Reversal-Invariant Topological Superconductivity and Majorana Kramers Pairs

被引：239

作者：

Zhang, Fan ^{[1
]}

Kane, C. L. ^{[1
]}

Mele, E. J. ^{[1
]}

机构：

[1] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 05期

基金：

美国国家科学基金会;

关键词：

NANOWIRE; FERMIONS; INSULATOR;

D O I：

10.1103/PhysRevLett.111.056402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We propose a feasible route to engineer one- and two-dimensional time-reversal-invariant topological superconductors (SCs) via proximity effects between nodeless s(+/-) wave iron-based SCs and semi-conductors with large Rashba spin-orbit interactions. At the boundary of a time-reversal-invariant topological SC, there emerges a Kramers pair of Majorana edge (bound) states. For a Josephson pi junction, we predict a Majorana quartet that is protected by mirror symmetry and leads to a mirror fractional Josephson effect. We analyze the evolution of the Majorana pair in Zeeman fields, as the SC undergoes a symmetry class change as well as topological phase transitions, providing an experimental signature in tunneling spectroscopy. We briefly discuss the realization of this mechanism in candidate materials and the possibility of using s and d wave SCs and weak topological insulators.

引用

页数：5

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