Tuning the proximity effect in a superconductor-graphene-superconductor junction

Details Tuning the proximity effect in a superconductor-graphene-superconductor junction Tuning the proximity effect in a superconductor-graphene-superconductor junction

2009-03-17

arxiv.org/abs/0903.2963v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Accepted for publication in Phys. Rev. B

Scientific paper

We have tuned in situ the proximity effect in a single graphene layer coupled to two Pt/Ta superconducting electrodes. An annealing current through the device changed the transmission coefficient of the electrode/graphene interface, increasing the probability of multiple Andreev reflections. Repeated annealing steps improved the contact sufficiently for a Josephson current to be induced in graphene.

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