Superconducting Diode Effects
Alex Levchenko (Department of Physics, University of Wisconsin-Madison, Madison, WI, USA)
In this talk, I will review the mechanisms underlying supercurrent nonreciprocity and explore the general principles of the supercurrent diode effect. As an illustrative example, I will discuss a model of a two-dimensional superconductor with Rashba-type spin-orbit coupling in the clean limit, subjected to an in-plane magnetic field, which realizes a helical superconducting phase. This discussion will be extended to disordered systems, multiphase superconductors, and specific realizations of this physics in Josephson junction devices and interferometers.
[1] A. Osin, A. Levchenko, M. Khodas, Anomalous Josephson diode effect in superconducting multilayers, Phys. Rev. B 109, 184512 (2024).
[2] J. Hasan, D. Shaffer,, M. Khodas, A. Levchenko, Supercurrent diode effect in Helical superconductors, Phys. Rev. B 110, 024508 (2024).
[3] D. Shaffer, D. Chichinadze, A. Levchenko, Superconducting diode effect in multiphase superconductors, Phys. Rev. B 110, 184509 (2024).
[4] Jaglul Hasan, Daniel Shaffer, Maxim Khodas, and Alex Levchenko, Superconducting diode efficiency from singlet-triplet mixing in disordered systems, Phys. Rev. B 111, 174514 (2025).
[5] Itai Bankier, Lotan Attias, Alex Levchenko, and Maxim Khodas, Superconducting diode effect in Ising superconductors, Phys. Rev. B 111, L180505 (2025).