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Accueil du site > Séminaires > Séminaires 2006 > Nanotubes de carbone : fluctuations supraconductrices dans un modèle à 3 bandes

Mardi 17/10/2006 - 14H00

Nanotubes de carbone : fluctuations supraconductrices dans un modèle à 3 bandes

Edmond Orignac, Laboratoire de Physique de l’ENS-Lyon

par Didier Poilblanc - 17 octobre 2006

Small radius nanotubes grown in a zeolite matrix have been shown to exhibit superconductivity at 10 K. Band structure calculations on small radius (5,0) nanotubes, indicate that 3 bands can be present at the Fermi level instead of two in usual single-wall nanotubes. In order to identify a potential one-dimensional origin for this superconducting transition, we have investigated a three-band model of interacting electrons by bosonization and renormalization technique. We have obtained a regime of dominant superconducting fluctuations in this model in a certain parameter range.