Inelastic X-ray scattering in correlated (Mott) insulators.

T. P. Devereaux, G. E. D. McCormack
Department of Physics, University of Waterloo, Waterloo, ON, Canada

J. K. Freericks
Department of Physics, Georgetown University, Washington, DC, USA

We calculate the inelastic light scattering from X-rays, which
allows the photon to transfer both energy and momentum to the
strongly correlated charge excitations. We find that the charge transfer
peak and the low energy peak both broaden and disperse through the
Brillouin zone similar to what is seen in experiments in materials
like Ca_2CuO_2Cl_2.