Superconductivity in hole-doped C60 from electronic correlations

M. Granath; S. Östlund

doi:10.1103/PhysRevB.66.180501

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Superconductivity in hole-doped C60 from electronic correlations

M. Granath, S. Östlund

DOI 10.1103/PhysRevB.66.180501 · Physical Review B

T1

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Abstract

We derive a model for the highest occupied molecular-orbital band of a C60 crystal which includes on-site electron-electron interactions. The form of the interactions are based on the icosahedral symmetry of the C60 molecule together with a perturbative treatment of an isolated C60 molecule. Using this model we do a mean-field calculation in two dimensions on the [100] surface of the crystal. Due to the multiband nature we find that the electron-electron interactions can have a profound effect on the density of states as a function of doping. The doping dependence of the transition temperature can then be qualitatively different from that expected from simple BCS theory based on the density of states from band structure calculations.

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.	—	Pressure not reported	unknown