Enhanced superconducting diode effect in hybrid Josephson junctions
Abstract
The superconducting diode effect (SDE) has recently been observed in various systems, sparking interest in novel superconducting devices and offering a new platform to probe intrinsic material properties. Josephson junctions with strong Rashba spin-orbit coupling have exhibited nonreciprocal critical currents under applied magnetic fields. In this work, we investigate the SDE in Josephson junctions incorporating periodic hole arrays patterned into the superconducting leads on InAs heterostructures with epitaxial aluminum. We observe an enhanced diode effect when a top gate depletes the 2DEG in the region of the hole arrays, while preserving the overall supercurrent. Theoretical analysis shows that the physics behind this phenomenon is the increased difference of transparency between different bands in the junction. These results highlight a new pathway for engineering and controlling nonreciprocal superconducting transport in hybrid systems.
Keywords
Cite
@article{arxiv.2512.19017,
title = {Enhanced superconducting diode effect in hybrid Josephson junctions},
author = {Peng Yu and Han Fu and William F. Schiela and William Strickland and Bassel Heiba Elfeky and S. M. Farzaneh and Jacob Issokson and Wei Pan and Enrico Rossi and Javad Shabani},
journal= {arXiv preprint arXiv:2512.19017},
year = {2025}
}