2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/136490We present a first-principles investigation of the phonon-induced electron self-energy in graphene. The energy dependence of the self-energy reflects the peculiar linear bandstructure of graphene and deviates substantially from the usual metallic behavior. The effective band velocity of the Dirac fermions is found to be reduced by 4-8%, depending on doping, by the interaction with lattice vibrations. Our results are consistent with the observed linear dependence of the electronic linewidth on the binding energy in photoemission spectra.4 pages, 4 figures; reference 22 added, numerical error correctedMaterials Sciencetext