Superconductivity in molecular solids with Jahn-Teller phonons
Abstract
We analyze fulleride superconductivity at experimental doping levels, treating the electron-electron and electron-phonon interactions on an equal footing, and establish the existence of novel physics which helps explain the unusually high superconducting transition temperatures in these systems. The Jahn-Teller phonons create a local (intramolecular) pairing that is surprisingly resistant to the Coulomb repulsion, despite the weakness of retardation in these low-bandwidth systems. The requirement for coherence throughout the solid to establish superconductivity then yields a very strong doping dependence to Tc, one consistent with experiment and much stronger than expected from standard Eliashberg theory.
Cite
@article{arxiv.cond-mat/0208454,
title = {Superconductivity in molecular solids with Jahn-Teller phonons},
author = {J. E. Han and O. Gunnarsson and V. H. Crespi},
journal= {arXiv preprint arXiv:cond-mat/0208454},
year = {2007}
}
Comments
4 page, RevTeX, 4 eps figures, additional material available at http://www.mpi-stuttgart.mpg.de/andersen/fullerene/