| Issue |
Europhys. Lett.
Volume 56, Number 4, November 2001
|
|
|---|---|---|
| Page(s) | 583 - 589 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00560-3 | |
| Published online | 01 December 2003 | |
Magnon-assisted Andreev reflection in a ferromagnet-superconductor junction
Department of Physics, Lancaster University -
Lancaster, LA1 4YB, UK
Received:
4
April
2001
Accepted:
24
August
2001
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 find 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.
PACS: 73.23.-b – Electronic transport in mesoscopic systems / 74.80.Fp – Point contacts; SN and SNS junctions / 72.25.-b – Spin polarized transport
© EDP Sciences, 2001
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