Time reversal symmetry breaking and zero magnetic field Josephson diode effect in Dirac semimetal Cd3As2 mediated asymmetric SQUIDs
W. Yu, J. J. Cuozzo, K. Sapkota, E. Rossi, D. X. Rademacher, T. M. Nenoff, W. Pan
DOI 10.1103/PhysRevB.110.104510 · Physical Review B
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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 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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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