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

被引：1
|
作者：
Yu, W. [1 ]
Cuozzo, J. J. [2 ]
Sapkota, K. [1 ]
Rossi, E. [3 ]
Rademacher, D. X. [1 ]
Nenoff, T. M. [1 ]
Pan, W. [2 ]
机构：
[1] Sandia Natl Labs, Albuquerque, NM 87185 USA
[2] Sandia Natl Labs, Livermore, CA 94551 USA
[3] William & Mary, Dept Phys, Williamsburg, VA 23187 USA
来源：
PHYSICAL REVIEW B | 2024年 / 110卷 / 10期
基金：
美国国家科学基金会;
关键词：
Diodes - Gallium compounds - Josephson junction devices - Semiconducting cadmium compounds - SQUIDs;
D O I：
10.1103/PhysRevB.110.104510
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A zero-magnetic-field Josephson diode effect (JDE) is observed in an asymmetric superconducting quantum interference device (SQUID) mediated by Dirac semimetal Cd3As2. 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 Cd3As2, 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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页数：9
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