Electron-phonon interaction and Raman linewidth in superconducting fullerides

Abstract

We propose a microscopic theory of the interaction between long-wave molecular phonons and electrons in fullerides in the presence of disorder. Phonon relaxation rate and frequency renormalization are discussed. Finite electronic bandwidth reduces phonon relaxation rate at $q=0$. Electron-phonon coupling constants with molecular modes in fullerides are estimated. The results are in good agreement with photoemission experiments.