TMR Effect in a FM-QD-FM System
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| Format: | Artículo científico |
| Sprache: | en |
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Sociedade Brasileira de Física
2004
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| _version_ | 1876429968606494720 |
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| author | F. M. Souza |
| author_facet | F. M. Souza |
| contents | TMR Effect in a FM-QD-FM System F. M. Souza J. C. Egues A. P. Jauho Física, Astronomía y Matemáticas Using the Keldysh nonequilibrium technique, we study current and the tunnelling magnetoresistance (TMR)in a quantum dot coupled to two ferromagnetic leads (FM-dot-FM). The current is calculated for both paralleland antiparallel lead alignments. Coulomb interaction and spin-flip scattering are taken into account withinthe quantum dot. Interestingly, we find that these interactions play a contrasting role in the TMR: there is aparameter range where spin flip suppresses the TMR, while Coulomb correlations enhance it, due to Coulombblockade. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434406 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2B Vol.34 |
| format | Artículo científico |
| id | redalyc_46434406 |
| institution | Redalyc |
| language | en |
| publishDate | 2004 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | TMR Effect in a FM-QD-FM System F. M. Souza Física, Astronomía y Matemáticas TMR Effect in a FM-QD-FM System F. M. Souza J. C. Egues A. P. Jauho Física, Astronomía y Matemáticas Using the Keldysh nonequilibrium technique, we study current and the tunnelling magnetoresistance (TMR)in a quantum dot coupled to two ferromagnetic leads (FM-dot-FM). The current is calculated for both paralleland antiparallel lead alignments. Coulomb interaction and spin-flip scattering are taken into account withinthe quantum dot. Interestingly, we find that these interactions play a contrasting role in the TMR: there is aparameter range where spin flip suppresses the TMR, while Coulomb correlations enhance it, due to Coulombblockade. 2004 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46434406 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.2B Vol.34 |
| title | TMR Effect in a FM-QD-FM System |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46434406 |