Issue
EPL
Volume 86, Number 6, June 2009
Article Number 67002
Number of page(s) 6
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
DOI http://dx.doi.org/10.1209/0295-5075/86/67002
Published online 01 July 2009
EPL, 86 (2009) 67002
DOI: 10.1209/0295-5075/86/67002

Proximity effect in atomic-scaled hybrid superconductor/ferromagnet structures: Crucial role of electron spectra

X. Montiel1, D. Gusakova1, M. Daumens2 and A. Buzdin1

1   Condensed Matter Theory Group, CPMOH, Université de Bordeaux and CNRS F-33405 Talence, France, EU
2   LPT, Université Bordeaux 1 - 33170 Gradignan, France, EU

xavier.montiel@u-bordeaux1.fr

received 24 March 2009; accepted in final form 31 May 2009; published June 2009
published online 1 July 2009

Abstract
We study the influence of the configuration of the majority and minority spin subbands of electron spectra on the properties of atomic-scaled superconductor/ferromagnet S/F/S and F/S/F hybrid structures. At low temperatures, the S/F/S junction is either a 0 or junction depending on the energy shift between S and F materials and the anisotropy of the Fermi surfaces. We found that the spin-switch effect in F/S/F system can be reversed if the minority spin electron spectra in F metal is of the hole-like type.

PACS
74.45.+c - Proximity effects; Andreev effect; SN and SNS junctions.
74.78.Fk - Multilayers, superlattices, heterostructures.

© EPLA 2009