Laboratoire de Physique Théorique
Toulouse - UMR 5152

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.