Time reversal symmetry breaking and zero magnetic field Josephson diode effect in Dirac semimetal Cd3As2 mediated asymmetric SQUIDs

IF 3.7 2区物理与天体物理 Q1 Physics and Astronomy Physical Review B Pub Date : 2024-09-13 DOI:10.1103/physrevb.110.104510

W. Yu, J. J. Cuozzo, K. Sapkota, E. Rossi, D. X. Rademacher, T. M. Nenoff, W. Pan

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Abstract

A zero-magnetic-field Josephson diode effect (JDE) is observed in an asymmetric superconducting quantum interference device (SQUID) mediated by Dirac semimetal

C d_{3} A s_{2}

. We argue that a phase coupling between the surface and bulk superconducting channels, a unique phenomenon recently identified in the observations of fractional Josephson effect and Leggett modes in

C d_{3} A s_{2}

, can break time reversal symmetry and therefore give rise to the zero-field JDE. Our results are anticipated to have important implications in superconducting electronic circuit applications.

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狄拉克半金属 Cd3As2 介导的非对称 SQUID 中的时间反转对称破缺和零磁场约瑟夫森二极管效应

在由狄拉克半金属 Cd3As2 介导的非对称超导量子干涉装置（SQUID）中观测到了零磁场约瑟夫森二极管效应（JDE）。我们认为，Cd3As2 的分数约瑟夫森效应和莱格特模式是最近在观测中发现的一种独特现象，它可以打破时间反转对称性，从而产生零场 JDE。我们的研究结果预计将对超导电子电路应用产生重要影响。

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来源期刊

Physical Review B 物理-物理：凝聚态物理

CiteScore

6.70

自引率

32.40%

发文量

审稿时长

3.0 months

期刊介绍： Physical Review B (PRB) is the world’s largest dedicated physics journal, publishing approximately 100 new, high-quality papers each week. The most highly cited journal in condensed matter physics, PRB provides outstanding depth and breadth of coverage, combined with unrivaled context and background for ongoing research by scientists worldwide. PRB covers the full range of condensed matter, materials physics, and related subfields, including: -Structure and phase transitions -Ferroelectrics and multiferroics -Disordered systems and alloys -Magnetism -Superconductivity -Electronic structure, photonics, and metamaterials -Semiconductors and mesoscopic systems -Surfaces, nanoscience, and two-dimensional materials -Topological states of matter