Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Conference contribution/Paper › peer-review
Publication date | 2001 |
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Host publication | Electronic Correlations: From Meso- to Nano-Physics |
Editors | T Martin, G Montambaux, JT ThanhVan |
Place of Publication | Les Ulis |
Publisher | E D P SCIENCES |
Pages | 147-152 |
Number of pages | 6 |
ISBN (print) | 2-86883-570-8 |
<mark>Original language</mark> | English |
Event | 36th Rencontres de Moriond on Electronic Correlations - Savoie Duration: 20/01/2001 → 27/01/2001 |
Conference | 36th Rencontres de Moriond on Electronic Correlations |
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City | Savoie |
Period | 20/01/01 → 27/01/01 |
Conference | 36th Rencontres de Moriond on Electronic Correlations |
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City | Savoie |
Period | 20/01/01 → 27/01/01 |
We study subgap transport in a ferromagnet-superconductor junction at low temperature due to Andreev reflection. 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. Using the s-f model and focusing on half-metallic ferromagnets, we calculate the corresponding nonlinear contribution to the current 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.