Impact of Junction Length on Supercurrent Resilience against Magnetic Field in InSb-Al Nanowire Josephson Junctions

Semiconducting nanowire Josephson junctions representan attractiveplatform to investigate the anomalous Josephson effect and detecttopological superconductivity. However, an external magnetic fieldgenerally suppresses the supercurrent through hybrid nanowire junctionsand significantly limits the field range in which the supercurrentphenomena can be studied. In this work, we investigate the impactof the length of InSb-Al nanowire Josephson junctions on the supercurrentresilience against magnetic fields. We find that the critical parallelfield of the supercurrent can be considerably enhanced by reducingthe junction length. Particularly, in 30 nm long junctions supercurrentcan persist up to 1.3 T parallel field approaching the criticalfield of the superconducting film. Furthermore, we embed such shortjunctions into a superconducting loop and obtain the supercurrentinterference at a parallel field of 1 T. Our findings are highly relevantfor multiple experiments on hybrid nanowires requiring a magnetic-field-resilientsupercurrent.