We use a nonequilibrium implementation of extended dynamical mean field theory to study the effect of dynamical screening in photo-excited Mott insulators. The insertion of doublons and holes adds low-energy screening modes and leads to a reduction of the Mott gap. The coupling to low-energy bosonic modes further- more opens new relaxation channels and significantly speeds up the thermalization process. We also consider the effect of the energy distribution of the doped carriers on the screening.
@article{arxiv.1507.07953,
title = {Dynamics of screening in photo-doped Mott insulators},
author = {Denis Golez and Martin Eckstein and Philipp Werner},
journal= {arXiv preprint arXiv:1507.07953},
year = {2015}
}