Eur. Phys. J. B 52, 9-14 (2006)
https://doi.org/10.1140/epjb/e2006-00264-0

Critical temperature and interface transparency of N/S/N triple layers: theory and experiment

¹ Belarus State University of Informatics and Radioelectronics, P. Brovka str. 6, Minsk, 220013, Belarus
² Dipartimento di Fisica “E.R. Caianiello” and CNR/INFM – Laboratorio Regionale SuperMat, Università degli Studi di Salerno, Baronissi, 84081, Italy

Corresponding author: ^a attanasio@sa.infn.it

Received: 13 April 2006
Revised: 25 May 2006
Published online: 29 June 2006

Abstract

The influence of the finite transparency, , of superconductor/normal metal (S/N) interface on the critical temperature of proximity coupled layered structures is investigated in the dirty limit on the basis of the microscopic equations solved exactly by a matrix method. The calculated theoretical curves satisfactory reproduce the experimental dependencies of the critical temperature on the thickness of the superconducting layers in N/S/N trilayers. The relation between the transparency coefficient and the normal metal coherence length is also discussed.