Optical properties of the Holstein-t-J model from dynamical mean-field theory

We employ dynamical mean-field theory to study the optical conductivity ?(?) of one hole in the Holstein-t–J model. We provide an exact solution for ?(?) in the limit of infinite connectivity. We apply our analysis to Nd2-xCexCuO4. We show that our model can explain many features of the optical conductivity in this compounds in terms of magnetic/lattice polaron formation.