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Coherent Electron Transport in Superconducting-Normal Metallic Films | | Frank K. Wilhelm
; Andrei D. Zaikin
; Herve Courtois .
; | | Date: |
22 May 1997 | | Subject: | Superconductivity; Mesoscopic Systems and Quantum Hall Effect | cond-mat.supr-con cond-mat.mes-hall | | Affiliation: | 1,2) and Herve Courtois . ( Institut fuer Theoretische Festkoerperphysik, Universitaet Karlsruhe, Karlsruhe, Germany. P.N. Lebedev Physics Institute, Moscow, Russia. CRTBT-CNRS, associe a l’Universite Joseph Fourier, Grenoble, France | | Abstract: | We study the transport properties of a quasi-two-dimensional diffusive normal metal film attached to a superconductor. We demonstrate that the properties of such films can essentially differ from those of quasi-one-dimensional systems: in the presence of the proximity induced superconductivity in a sufficiently wide film its conductance may not only increase but also decrease with temperature. We develop a quantitative theory and discuss the physical nature of this effect. Our theory provides a natural explanation for recent experimental findings referred to as the ``anomalous proximity effect’’. | | Source: | arXiv, cond-mat/9705225 | | Services: | Forum | Review | PDF | Favorites | |
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