Metallic Screening and Correlation Effects in Superconducting Fullerenes

P. E. Lammert; D. S. Rokhsar; S. Chakravarty; S. Kivelson; M. I. Salkola

doi:10.1103/PhysRevLett.74.996

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Metallic Screening and Correlation Effects in Superconducting Fullerenes

P. E. Lammert, D. S. Rokhsar, S. Chakravarty, S. Kivelson, M. I. Salkola

DOI 10.1103/PhysRevLett.74.996 · Physical Review Letters

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Abstract

We consider the frequency-dependent Coulomb interaction between electrons in a molecular metal in the limit in which the conduction bandwidth is much less than the plasma frequency, which in turn is much less than intramolecular excitation energies. In particular, we compute the effective interactions at the Fermi energy in alkali-doped C60 to second order in the screened interactions. 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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	33	Pressure not reported	onset