X-ray Raman scattering from molecules and solids in the framework of the Mahan-Nozieres-De Dominicis model - art. no. 165116

We have developed a formulation of resonant x-ray Raman scattering of molec ules and solids based on the Mahan-Nozieres-De Dominicis model. A key step in the formulation is given by a reduction of the Keldysh-Dyson equations f or the Green's function to a set of linear algebraic equations. This gave w ay for a tractable scheme that can be used to analyze the resonant x-ray sc attering in the whole time domain. The formalism is used to investigate the role of core-hole relaxation, interference, band filling, detuning, and si ze of the scattering target. Numerical applications are per-formed with a o ne-dimensional tight-binding model.