| HAL : in2p3-00126268, version 1 |
| arXiv : cond-mat/0701376 |
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| A length scale for the superconducting Nernst signal above T$_{c}$ in Nb$_{0.15}$Si$_{0.85}$ |
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| A. Pourret1H. Aubin1J. Lesueur1C.A. Marrache-Kikuchi2L. Berge2L. Dumoulin2K. Behnia1 |
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| (2007) |
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| We present a study of the Nernst effect in amorphous superconducting thin films of Nb$_{0.15}$Si$_{0.85}$. The field dependence of the Nernst coefficient above T$_{c}$ displays two distinct regimes separated by a field scale set by the Ginzburg-Landau correlation length. A single function $F(\xi)$, with the correlation length as its unique argument set either by the zero-field correlation length (in the low magnetic field limit) or by the magnetic length (in the opposite limit), describes the Nernst coefficient. We conclude that the Nernst signal observed on a wide temperature ($30 \times T_c$) and field ($4 \times B_{c2}$) range is exclusively generated by short-lived Cooper pairs. |
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| 1 : | LPQ - Laboratoire de Physique Quantique |
| 2 : | CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse |
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| Thème(s) | : | Physique/Matière Condensée/Supraconductivité |
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| Lien vers le texte intégral : |
| in2p3-00126268, version 1 | |
| http://hal.in2p3.fr/in2p3-00126268 | |
| oai:hal.in2p3.fr:in2p3-00126268 | |
| Contributeur : Dominique Girod | |
| Soumis le : Mercredi 24 Janvier 2007, 14:42:12 | |
| Dernière modification le : Mercredi 24 Janvier 2007, 14:54:51 | |