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Magnon-assisted Andreev transport across ferromagnet-superconductor junctions

McCann, E and Tkachov, G and Falko, Vladimir (2002) Magnon-assisted Andreev transport across ferromagnet-superconductor junctions. Physica E: Low-dimensional Systems and Nanostructures, 12 (1-4). pp. 938-941. ISSN 1386-9477

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Abstract

We study subgap transport due to Andreev reflection in a ferromagnet-superconductor junction at low temperature. The mismatch of spin polarized current in the ferromagnet and spinless current in the Superconductor results in an additional contact resistance which can be reduced by magnon emission in the ferromagnet. We find that magnon-assisted Andreev reflection produces a non-linear contribution to the asymmetric part of the conductance, G(V)-G(-V), which is related to the density of states of magnons in the ferromagnet.

Item Type: Article
Journal or Publication Title: Physica E: Low-dimensional Systems and Nanostructures
Uncontrolled Keywords: Andreev reflection ; Spin polarized transport ; Magnon-assisted tunneling
Subjects: Q Science > QC Physics
Departments: Faculty of Science and Technology > Physics
ID Code: 57037
Deposited By: ep_importer_pure
Deposited On: 31 Aug 2012 11:21
Refereed?: Yes
Published?: Published
Last Modified: 31 Aug 2012 11:21
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/57037

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