Induced Superconductivity in Graphene

Graphene may exhibit many novel transport characteristics in the superconducting regime. New phenomena, such as pseudo-diffusive dynamics of ballistic electrons, the relativistic Josephson effect, and specular Andreev reflection are predicted by theoretical models combining relativistic quantum mechanics and superconductivity. We study these phenomena experimentally with superconductor-graphene-superconductor junction.

The supercurrent in graphene is induced by the superconducting contacts through proximity effect. Various superconducting materials are considered for different explorations. In particular, we apply reactive sputtering of NbN or Nb to put superconducting leads which exhibits high critical temperatures and large superconducting gaps.