235 articles – 3602 Notices  [english version]
 HAL : in2p3-00126268, version 1
 arXiv : cond-mat/0701376
 A length scale for the superconducting Nernst signal above T$_{c}$ in Nb$_{0.15}$Si$_{0.85}$
 (2007)
 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.
 Thème(s) : Physique/Matière Condensée/Supraconductivité
 Lien vers le texte intégral : http://fr.arXiv.org/abs/cond-mat/0701376
 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