"Nonequilibrium Dynamical Mean-Field Theory for the Charge-Density-Wave Phase of the Falicov-Kimball Model"

O. P. Matveev: A. M. Shvaika, T. P. Devereaux, J. K. Freericks; Journal of Superconductivity and Novel Magnetism, 12/08/15.

Additional Authors: A. M. Shvaika, T. P. Devereaux, J. K. Freericks

Abstract:

Nonequilibrium dynamical mean-field theory (DMFT) is developed for the case of the charge-density-wave ordered phase. We consider the spinless Falicov-Kimball model which can be solved exactly. This strongly correlated system is then placed in an uniform external dc electric field. We present a complete derivation for nonequilibrium dynamical mean-field theory Green’s functions defined on the Keldysh-Schwinger time contour. We also discuss numerical issues involved in solving the coupled equations.