Phase diffusion in graphene-based Josephson junctions

Details Phase diffusion in graphene-based Josephson junctions Phase diffusion in graphene-based Josephson junctions

2011-09-04

arxiv.org/abs/1109.0769v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures, PRL

Scientific paper

We report on graphene-based Josephson junctions with contacts made from lead. The high transition temperature of this superconductor allows us to observe the supercurrent branch at temperatures up to $\sim 2$ K, at which point we can detect a small, but non-zero, resistance. We attribute this resistance to the phase diffusion mechanism, which has not been yet identified in graphene. By measuring the resistance as a function of temperature and gate voltage, we can further characterize the nature of electromagnetic environment and dissipation in our samples.

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