Optical Conductivity in the t-J Holstein Model

摘要

Using recently developed numerical method we compute optical conductivity of the t-J model coupled to optical phonons. Near the crossover to the strong electron-phonon coupling regime, optical conductivity shows a two-peak structure. This finding suggests that in the framework of the t-J Holstein model the two peak structure seen in recent optical measurements is due to magnetic excitations coupled to lattice degrees of freedom via doped charge carriers [1].