Pb-graphene-Pb Josephson junctions: characterization in B field

I. V. Borzenets, U. C. Coskun, H. Mebrahtu, G. Finkelstein

Published 2011-12-09Version 1

We fabricate superconductor-graphene-superconductor Josephson junctions with superconducting regions made of lead (Pb). The critical current through grapehene may be modulated by external magnetic field; the resulting Fraunhofer interference pattern shows several periods of oscillations, indicating that the junction is uniform. Deviations from the perfect Fraunhofer pattern are observed, and their cause is explained by a simulation that takes into account the sample design.