Observation of Supercurrent in PbIn-Graphene-PbIn Josephson Junction

Details Observation of Supercurrent in PbIn-Graphene-PbIn Josephson Junction Observation of Supercurrent in PbIn-Graphene-PbIn Josephson Junction

2011-01-30

arxiv.org/abs/1101.5739v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 7 figures, accepted in PRB

Scientific paper

Superconductor-graphene-superconductor (SGS) junction provides a unique platform to study relativistic electrodynamics of Dirac fermions combined with proximity-induced superconductivity. We report observation of the Josephson effect in proximity-coupled superconducting junctions of graphene in contact with Pb1-xInx (x=0.07) electrodes for temperatures as high as T = 4.8K, with a large IcRn (~ 255 microV). This demonstrates that Pb1-xInx SGS junction would facilitate the development of the superconducting quantum information devices and superconductor-enhanced phase-coherent transport of graphene.

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