Influence of temperature-dependent inelastic scattering on the superconducting proximity effect
Department of Physics and Astronomy, Northwestern
University Evanston, IL 60208, USA
Accepted: 10 February 2000
We have measured the differential resistance of mesoscopic gold wires of different lengths connected to an aluminum superconductor as a function of temperature and voltage. Our experimental results differ substantially from theoretical predictions which assume an infinite temperature-independent gap in the superconductor. In addition to taking into account the temperature dependence of the gap, we must also introduce a temperature-dependent inelastic scattering length in order to fit our data.
PACS: 73.23.-b – Mesoscopic systems / 74.50.+r – Proximity effects, weak links, tunneling phenomena, and Josephson effects / 74.80.Fp – Point contacts; SN and SNS junctions
© EDP Sciences, 2000