Title :
Pb–Graphene–Pb Josephson Junctions: Characterization in Magnetic Field
Author :
Borzenets, I.V. ; Coskun, U.C. ; Mebrahtu, H. ; Finkelstein, G.
Author_Institution :
Duke Univ., Durham, NC, USA
Abstract :
We fabricate superconductor-graphene-superconductor Josephson junctions with superconducting regions made of lead (Pb). The critical current through graphene may be modulated by the external magnetic field; the resulting Fraunhofer interference pattern shows several periods of oscillations, suggesting 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.
Keywords :
Josephson effect; critical current density (superconductivity); graphene; lead; oscillations; superconducting materials; superconductor-normal-superconductor devices; Fraunhofer interference pattern; Pb-C-Pb; Pb-graphene-Pb Josephson junctions; critical current; external magnetic field; magnetic field characterization; oscillations; superconducting regions; superconductor-graphene-superconductor Josephson junctions; Critical current; Josephson junctions; Junctions; Magnetic tunneling; Superconducting magnets; Temperature measurement; Josephson junctions; superconducting device measurements; superconducting films; superconducting materials; superconductor–normal–superconductor devices;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2012.2198472
