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

Autor: Yu, W., Cuozzo, J. J., Sapkota, K., Rossi, E., Rademacher, D. X., Nenoff, T. M., Pan, W.
Rok vydání: 2024
Předmět:
Zdroj: Phys. Rev. B 110, 104510 (2024)
Druh dokumentu: Working Paper
DOI: 10.1103/PhysRevB.110.104510
Popis: 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.
Databáze: arXiv