Development of superconducting interference device based on graphene

Abstract

We fabricated and examined the operation of graphene-based superconducting interference device (SQUID) consisting of two superconductor-single layer graphene-superconductor junctions connected in parallel on a superconducting loop made of aluminum. Current-voltage characteristic of the device exhibits supercurrent flowing through SGS junctions. Mean switching current can be modulated with the applied magnetic field periodically. Deduced oscillation period coincides well with that estimated from the device geometry, suggesting that our device works as a graphene-based SQUID. © Published under licence by IOP Publishing Ltd.