No-go theorem for a time-reversal invariant topological phase in noninteracting systems coupled to conventional superconductors

被引：24

作者：

Haim, Arbel ^{[1
]}

Berg, Erez ^{[1
]}

Flensberg, Karsten ^{[2
]}

Oreg, Yuval ^{[1
]}

机构：

[1] Weizmann Inst Sci, Dept Condensed Matter Phys, IL-76100 Rehovot, Israel

[2] Univ Copenhagen, Niels Bohr Inst, Ctr Quantum Devices, DK-2100 Copenhagen, Denmark

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 16期

基金：

欧洲研究理事会; 新加坡国家研究基金会;

关键词：

MAJORANA FERMIONS;

D O I：

10.1103/PhysRevB.94.161110

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We prove that a system of noninteracting electrons proximity coupled to a conventional s-wave superconductor cannot realize a time-reversal invariant topological phase. This is done by showing that for such a system, in either one or two dimensions, the topological invariant of the corresponding symmetry class (DIII) is always trivial. Our results suggest that the pursuit of Majorana bound states in time-reversal invariant systems should be aimed at interacting systems or at proximity to unconventional superconductors.

引用

页数：5

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