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Magnon-assisted Andreev reflection in a ferromagnet-superconductor junction

Research output: Contribution to journalJournal article

Published

<mark>Journal publication date</mark>11/2001
<mark>Journal</mark>EPL
Issue4
Volume56
Number of pages7
Pages583-589
<mark>Original language</mark>English

Abstract

A new mechanism for inelastic Andreev reflection at a ferromagnetic metal-superconductor interface is proposed, which consists of the simultaneous injection of a Cooper pair from the superconductor and the emission of a magnon inside the ferromagnet. We nd that this process generates an additional contribution to the subgap non-linear I(V) characteristics, which is asymmetric with respect to the sign of the bias voltage and is related to the density of states of magnons in the ferromagnet.