Unified formalism of Andreev reflection at a ferromagnet/superconductor interface

Tingyong Chen, Z. Tesanovic, C. L. Chien

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

We present a unified formalism of Andreev reflection of a partial polarized current at a ferromagnet/superconductor interface instead of assuming a linear combination of unpolarized and polarized currents. The Andreev reflection is limited by the states of minority spins and the extra majority spins become evanescent wave. We further study the effects of spin polarization, inelastic scattering, and interfacial scattering on the Andreev reflection, normal reflection, and transmitted probabilities in equilibrium as well as under a bias. Our model, which reduces to those of Blonder, Tinkham, and Klapwijk, Mazin, and Dynes in three limiting cases, provides a significantly better description of the experimental results.

Original languageEnglish (US)
Article number146602
JournalPhysical Review Letters
Volume109
Issue number14
DOIs
StatePublished - Oct 3 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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