Anomalous Josephson diode effect in superconducting multilayers
arXiv:2311.14860 · doi:10.1103/PhysRevB.109.184512
Abstract
In this study, we explore the Josephson current-phase relation within a planar diffuse tunneling superconducting multilayer junction subjected to a parallel magnetic field. Our investigation involves computing the supercurrent associated with a fixed jump in the phase of the order parameter at each of the two insulating interfaces, allowing us to derive the current-phase relation for the junction. Employing perturbation theory in junction conductance, we determine both the first and second harmonics of the current-phase relation under specific magnetic field conditions. Notably, the presence of a strong spin-orbit interaction in the middle region of the junction introduces an anomalous Josephson effect. The interplay between spin-orbit and Zeeman interactions results in the emergence of an effective vector potential. This specific characteristic induces a phase shift in each harmonic of the current-phase relation without altering the overall shape of the relation. The mechanism for the Josephson diode effect is discussed for disordered junctions of multiband superconductors.
23 pages, 8 figures
References in corpus (3)
Cited by in corpus (7)
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- Superconducting diode efficiency from singlet-triplet mixing in disordered systems
- Design of a Josephson diode based on double magnetic impurities
- Supercurrent Diode Effect in Josephson Interferometers with Multiband Superconductors
- Josephson Diode Effect from Nonequilibrium Current in a Superconducting Interferometer
- Efficiency of the superconducting diode effect of pair-density-wave states in two-dimensional -wave altermagnets