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Quantum Spin Fluctuations as a Source of Long-Range Proximity Effects in Diffusive Ferromagnet-Superconductor Structures

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arxiv cond-mat/0012437 v1 pith:BQPNMXYR submitted 2000-12-22 cond-mat.mes-hall cond-mat.supr-con

A. Kadigrobov , R. I. Shekhter , M. Jonson This is my paper · ORCID
classification cond-mat.mes-hallcond-mat.supr-con
keywords spinferromagnet-superconductorferromagnetsfluctuationslong-rangeproximityquantumaffect
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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 lenght scale typical for non-magnetic materials, but anomalously large for ferromagnets.

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  1. Quantized resonant tunneling effect in Josephson junctions with ferromagnetic bilayers

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    In 1D SF1F2S Josephson junctions, a barrier at the F1/F2 interface creates critical-current resonance peaks at Q_i d_i = (n_i + 1/2)π, attributed to zero-spin-projection triplet pairs, with accumulated phase setting t...

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