HIGH-TEMPERATURE SUPERCONDUCTIVITY IN INTERCALATED MOLECULAR C60/CHX3(X=Cl, Br, I)

Intercalating polyatomic molecules into a superconductor strongly modifies its superconducting properties. A mechanism for a large increase in Tc is proposed that explains recent experimental findings on C60/CHX3(X=Cl, Br, I). The increase of Tc upon intercalation as well as upon Cl→Br substitution is described in terms of the additional contribution to pairing interaction arising from the coupling of holes (or electrons) to the vibrational manifold of the intercalated haloform molecules. We also present first optimization of the crystal structure and calculations of the band structure for neutral C60/CHCl3.