Superconductivity in Fullerides

Details Superconductivity in Fullerides Superconductivity in Fullerides

1996-11-20

arxiv.org/abs/cond-mat/9611150v1

Rev. Mod. Phys. 69, 575 (1997)

Physics

Condensed Matter

Superconductivity

33 pages, latex2e, revtex using rmp style, 15 figures, submitted to Review of Modern Physics, more information at http://rad

Scientific paper

10.1103/RevModPhys.69.575

Experimental studies of superconductivity 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 the A_3 C_60 are not Mott-Hubbard insulators, in spite of the large Coulomb interaction. Estimates of the Coulomb pseudopotential $\mu^*$, 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.

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