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

  • V. N. Kushnir
  • S. L. Prischepa
  • C. Cirillo
  • C. Attanasio
Solid and Condensed State Physics

Abstract.

The influence of the finite transparency, \({\mathcal T}\), 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.

PACS.

74.45.+c Proximity effects; Andreev effect; SN and SNS junctions 74.78.Fk Multilayers, superlattices, heterostructures 

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2006

Authors and Affiliations

  • V. N. Kushnir
    • 1
  • S. L. Prischepa
    • 1
  • C. Cirillo
    • 2
  • C. Attanasio
    • 2
  1. 1.Belarus State University of Informatics and RadioelectronicsMinskBelarus
  2. 2.Dipartimento di Fisica “E.R. Caianiello” and CNR/INFM – Laboratorio Regionale SuperMat, Università degli Studi di SalernoBaronissiItaly

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