%0 Journal Article
%T Coupled plasmon - phonon excitations in extrinsic monolayer graphene
%A V. U. Nazarov
%A F. Alharbi
%A T. S. Fisher
%A S. Kais
%J Physics
%D 2013
%I arXiv
%R 10.1103/PhysRevB.89.195423
%X The existence of an acoustic plasmon in extrinsic (doped or gated) monolayer graphene was found recently in an {\it ab initio} calculation with the frozen lattice [M. Pisarra {\it et al.}, arXiv:1306.6273, 2013]. By the {\em fully dynamic} density-functional perturbation theory approach, we demonstrate a strong coupling of the acoustic plasmonic mode to lattice vibrations. Thereby, the acoustic plasmon in graphene does not exist as an isolated excitation, but it is rather bound into a combined plasmon-phonon mode. We show that the coupling provides a mechanism for the {\em bidirectional} energy exchange between the electronic and the ionic subsystems with fundamentally, as well as practically, important implications for the lattice cooling and heating by electrons in graphene.
%U http://arxiv.org/abs/1310.2824v1