Quantum spin fluctuations as a source of long-range proximity effects in diffusive ferromagnet-super conductor structures

2000/12/22 by A. M. Kadigrobov, A. Kadigrobov, R. I. Shekhter +1 · 7 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.mes-hall #cond-mat.supr-con

paper · pdf · doi:10.1209/epl/i2001-00107-2

4 pages, 2 figures

arxiv created 2000/12/22 · openalex publication_date 2001/05/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30

Abstract

We show that quantum spin fluctuations in inhomogeneous ferromagnets drastically affect the Andreev reflection of electrons and holes at a ferromagnet-superconductor interface. As a result, a strong long-range proximity effect appears, associated with electron-hole spin-triplet correlations and persisting on a length scale typical for non-magnetic materials, but anomalously large for ferromagnets.

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• Induced ferromagnetism due to superconductivity in superconductor-ferromagnet structures
• Symmetries of Pairing Correlations in Superconductor–Ferromagnet Nanostructures
• Phase diagrams of ferromagnet-superconductor multilayers with misaligned exchange fields