We demonstrate enhanced robustness of the supercurrent through graphene-based Josephson junctions in which strong spin-orbit interactions (SOIs) are induced. We compare the persistence of a supercurrent at high magnetic fields between Josephson junctions with graphene on hexagonal boron-nitride and graphene on WS2, where strong SOIs are induced via the proximity effect. We find that in the shortest junctions both systems display signatures of induced superconductivity, characterized by a suppressed differential resistance at a low current, in magnetic fields up to 1 T. In longer junctions however, only graphene on WS2 exhibits induced superconductivity features in such high magnetic fields, and they even persist up to 7 T. We argue that these robust superconducting signatures arise from quasi-ballistic edge states stabilized by the strong SOIs induced in graphene by WS2.
@article{arxiv.2009.03120,
title = {Spin-orbit-enhanced robustness of supercurrent in graphene/WS$_2$ Josephson junctions},
author = {T. Wakamura and N. J. Wu and A. D. Chepelianskii and S. Guéron and M. Och and M. Ferrier and T. Taniguchi and K. Watanabe and C. Mattevi and H. Bouchiat},
journal= {arXiv preprint arXiv:2009.03120},
year = {2021}
}