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We study the optical conductivity in A3C60 (A =K, Rb). The effects of theelectron-phonon interaction is included to lowest order in the couplingstrength lambda. It is shown that this leads to a narrowing of the Drude peakby a factor 1+lambda and a transfer of weight to a mid-infrared peak atsomewhat larger energies than the phonon energy. Although this goes in theright direction, it is not sufficient to describe experiment.

physical review. b, condensed matter

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Optical conductivity inA3C60(A=