Interaction and superconducting transition in alkali-doped C_60

摘要

The intermolecular interactions in alkali-doped C_60 solids, A-3-x-yA'_xA''_yC_60(A, A', A''= alkali; x + y≤3), have been calculated, and their correlations with the structures and the superconducting transition temperatures T_c have also been investigated. It is found that the variations of the lattice constants a_0 of A_3-x-yA'_xA''_yC_60 solids and the superconducting transition temperature T_c can be satisfactorily explained from The viewpoint of interaction. It is shown that the relationship of T_c with interaction is much closer that that of T_c With lattice constant a_0.