2009/03/17 by C. M. Ojeda-Aristizabal, M. Ferrier, S. Gueron +1 · 1 citation
Physics and Astronomy · #cond-mat.mes-hall #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.79.165436
published as Phys. Rev. B 79, 165436 (Published 28 April 2009) · Accepted for publication in Phys. Rev. B
arxiv created 2009/03/17 · arxiv updated 2015/05/13
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.