| Issue |
Europhys. Lett.
Volume 62, Number 1, April 2003
|
|
|---|---|---|
| Page(s) | 97 - 102 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2003-00367-8 | |
| Published online | 01 March 2003 | |
Mesoscopic effects in superconductor-ferromagnet-super- conductor junctions
1
A. F. Ioffe Physical-Technical Institute - 194021 St. Petersburg, Russia
2
Physics Department, University of Washington - Seattle, WA 98195, USA
Received:
22
October
2002
Accepted:
4
February
2003
We show that at zero temperature the supercurrent through the
superconductor–ferromagnetic-metal–superconductor (SFS)
junctions does not decay exponentially with the thickness L of
the junction. At large L it has a random sample-specific sign
which can change with a change in temperature. In the case of
mesoscopic junctions the phase of the order parameter in the
ground state is a random sample-specific quantity. In the case of
junctions of large area the ground-state phase difference is 
.
PACS: 74.78.Fk – Multilayers, superlattices and heterostructures / 74.78.Na – Mesoscopic and nanoscale systems
© EDP Sciences, 2003
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