# Superconductivity in fullerides

@article{Gunnarsson1997SuperconductivityIF, title={Superconductivity in fullerides}, author={Olle Gunnarsson}, journal={Reviews of Modern Physics}, year={1997}, volume={69}, pages={575-606} }

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 A{sub 3}C{sub 60} are not Mott-Hubbard insulators, in spite of the large Coulomb interaction. Estimates of the Coulomb pseudopotential {mu}{sup…

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## References

SHOWING 1-10 OF 445 REFERENCES

Calculation of the superconducting critical temperature in doped fullerenes.

- PhysicsPhysical review. B, Condensed matter
- 1992

The Eliashberg equations are solved by taking properly into account that the Fermi energy is comparable to the on-molecule phonon energies, and results for the dopant and pressure dependence are presented.

Consequences of extended-range interactions in the correlation-induced model of superconductivity in the fullerenes.

- PhysicsPhysical review. B, Condensed matter
- 1993

The consequences of extended interactions on the charged-fullerene ground states, the binding energies, the critical U necessary for pair binding, a nonphononic isotope effect, and the renormalization of the Coulomb pseudopotential parameter μ * are presented.

Superconductivity in the Fullerenes

- PhysicsScience
- 1991

It is predicted that high frequency H2 modes acquire a width of about 20% of their frequency in superconductive fullerenes, and soften by about 5% compared to the insulating fullererenes.

Superconductivity of Doped Fullerenes

- Physics
- 1991

We consider the π-electrons on the surface of a single molecule of C60 (fullerene) interacting via an on-site repulsive interaction U. We show that, for a large range of parameters, the energy to add…

Electronic States of KxC60: Insulating, Metallic, and Superconducting Character

- PhysicsScience
- 1991

Theoretical analysis indicates that KxC60 is a strong coupling superconductor, and it is suggested that the enhanced electron-phonon interaction is related to the unique hybridization of the C sp-derived states.

Electronic Correlation Effects and Superconductivity in Doped Fullerenes

- Physics, ChemistryScience
- 1991

A theory of the electronic properties of doped fullerenes is proposed in which electronic correlation effects within single fullerene molecules play a central role, and qualitative predictions are…

Metallic screening and correlation effects in superconducting fullerenes.

- PhysicsPhysical review letters
- 1995

The frequency dependence of screening substantially reduces the effects of the long-range part of the Coulomb interaction, leading to the possibility of effective attraction between electrons.

Theory of Nonadiabatic Superconductivity

- Physics
- 1992

All high-temperature superconductors (and especially the C60 compounds) are characterized by a small Fermi energy (EF), of the order of the maximum phonon frequency (?D). We generalize therefore the…

Role of electron Coulomb interaction in superconductivity

- Physics
- 1983

The effect of the dynamically screened electron-electron interaction on the superconducting transition temperature is investigated by solving the Eliashberg equation in both frequency and momentum…