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Superconducting proximity effect in a diffusive ferromagnet with spin-active interfaces

A. Cottet and W. Belzig
Phys. Rev. B 72, 180503(R) – Published 21 November 2005

Abstract

We reconsider the problem of the superconducting proximity effect in a diffusive ferromagnet bounded by tunneling interfaces, using spin-dependent boundary conditions. This introduces for each interface a phase-shifting conductance Gϕ which results from the spin dependence of the phase shifts acquired by electrons upon scattering on the interface. We show that Gϕ strongly affects the density of states and supercurrents predicted for superconducting/ferromagnetic hybrid circuits. We show the relevance of this effect by identifying clear signatures of Gϕ in the data of T. Kontos et al. [Phys. Rev. Lett. 86, 304 (2001), 89, 137007 (2002)].

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  • Received 27 September 2005

DOI:https://doi.org/10.1103/PhysRevB.72.180503

©2005 American Physical Society

Authors & Affiliations

A. Cottet and W. Belzig

  • Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, 4056 Basel, Switzerland

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Issue

Vol. 72, Iss. 18 — 1 November 2005

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