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

Authors
Kadigrobov, A Shekhter, RI Jonson, M
Citation
A. Kadigrobov et al., Quantum spin fluctuations as a source of long-range proximity effects in diffusive ferromagnet-superconductor structures, EUROPH LETT, 54(3), 2001, pp. 394-400
Citations number
20
Categorie Soggetti
Physics
Journal title
EUROPHYSICS LETTERS
ISSN journal
02955075 → ACNP
Volume
54
Issue
3
Year of publication
2001
Pages
394 - 400
Database
ISI
SICI code
0295-5075(200105)54:3<394:QSFAAS>2.0.ZU;2-2
Abstract
We show that quantum spin fluctuations in inhomogeneous ferromagnets drasti cally affect the Andreev reflection of electrons and holes at a ferromagnet -superconductor interface. As a result, a strong long-range proximity effec t appears, associated with electron-hole spin-triplet correlations and pers isting on a length scale typical for non-magnetic materials, but anomalousl y large for ferromagnets.