ELECTRON-PHONON COUPLING IN A3C60 - CONTRIBUTIONS FROM INTERMOLECULARMODES

An accurate tight-binding fit to the full valence-conduction band regi on in K3C60 is used to generate deformation potentials for several pho non modes, including the optic intermolecular vibrations and libration s that have not been investigated previously. The resulting electron-p honon coupling constants indicate coupling that is likely to be crucia l in understanding electronic transport in the fullerides, and will pr ovide contributions to superconducting pairing. Results for the intram olecular A(g)(2) ''pentagonal pinch'' mode suggests nonadiabatic behav ior for this (and possibly other) very high frequency modes.