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Magnon-assisted Andreev transport across ferromagnet-superconductor junctions

Research output: Contribution to Journal/MagazineJournal articlepeer-review

<mark>Journal publication date</mark>01/2002
<mark>Journal</mark>Physica E: Low-dimensional Systems and Nanostructures
Issue number1-4
Number of pages4
Pages (from-to)938-941
Publication StatusPublished
<mark>Original language</mark>English


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.