Superconducting Quantum Interference in Edge State Josephson Junctions

被引：11

作者：

Galambos, Tamas Haidekker ^{[1
]}

Hoffman, Silas ^{[1
,2
]}

Recher, Patrik ^{[3
,4
]}

Klinovaja, Jelena ^{[1
]}

Loss, Daniel ^{[1
]}

机构：

[1] Univ Basel, Dept Phys, Klingelbergstr 82, CH-4056 Basel, Switzerland

[2] Univ Florida, Dept Phys, Gainesville, FL 32611 USA

[3] Tech Univ Carolo Wilhelmina Braunschweig, Inst Math Phys, D-38106 Braunschweig, Germany

[4] Lab Emerging Nanometrol, D-38106 Braunschweig, Germany

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 125卷 / 15期

基金：

瑞士国家科学基金会; 欧盟地平线“2020”;

关键词：

D O I：

10.1103/PhysRevLett.125.157701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study superconducting quantum interference in a Josephson junction linked via edge states in two-dimensional (2D) insulators. We consider two scenarios in which the 2D insulator is either a topological or a trivial insulator supporting one-dimensional (1D) helical or nonhelical edge states, respectively. In equilibrium, we find that the qualitative dependence of critical supercurrent on the flux through the junction is insensitive to the helical nature of the mediating states and can, therefore, not be used to verify the topological features of the underlying insulator. However, upon applying a finite voltage bias smaller than the superconducting gap to a relatively long junction, the finite-frequency interference pattern in the nonequilibrium transport current is qualitatively different for helical edge states as compared to nonhelical ones.

引用

页数：6

共 45 条

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