Topological π Josephson junction in superconducting Rashba wires

被引：39

作者：

Ojanen, Teemu ^{[1
]}

机构：

[1] Aalto Univ, Low Temp Lab OVLL, FI-00076 Aalto, Finland

来源：

PHYSICAL REVIEW B | 2013年 / 87卷 / 10期

基金：

芬兰科学院;

关键词：

ANYONS;

D O I：

10.1103/PhysRevB.87.100506

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this Rapid Communication we show that Rashba-based topological superconductor nanowires, where the spin-orbit coupling may change its sign, support three topological phases protected by chiral symmetry. When a superconducting phase gradient is applied over the interface of the two nontrivial phases, the Andreev spectrum is qualitatively phase shifted by pi compared to usual Majorana weak links. The topological pi junction has the striking property of exhibiting a maximum supercurrent in the vicinity of vanishing phase difference. Qualitative features of the junction are robust against disorder and magnetic fields violating chiral symmetry. The studied system could be realized by local gating of the wire or by an appropriate stacking of permanent magnets in synthetic Rashba systems. DOI: 10.1103/PhysRevB.87.100506

引用

页数：5

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