Superconductivity in fullerides
Abstract
Experimental studies of the superconductive properties of fullerides are briefly reviewed. Theoretical calculations of the electron-phonon coupling, in particular for the intramolecular phonons, are discussed extensively. The calculations are compared with coupling constants deduced from a number of different experimental techniques. It is discussed why A3C60 are not Mott-Hubbard insulators, in spite of the large Coulomb interaction. Estimates of the Coulomb pseudopotential μ*, describing the effect of the Coulomb repulsion on the superconductivity, as well as possible electronic mechanisms for the superconductivity, are reviewed. The calculation of various properties within the Migdal-Eliashberg theory and attempts to go beyond this theory are described.
- Publication:
-
Reviews of Modern Physics
- Pub Date:
- April 1997
- DOI:
- 10.1103/RevModPhys.69.575
- arXiv:
- arXiv:cond-mat/9611150
- Bibcode:
- 1997RvMP...69..575G
- Keywords:
-
- Condensed Matter - Superconductivity
- E-Print:
- 33 pages, latex2e, revtex using rmp style, 15 figures, submitted to Review of Modern Physics, more information at http://radix2.mpi-stuttgart.mpg.de/fullerene/fullerene.html