title: Lattice model of resonant inelastic x-ray scattering in metals: relation of a strong core hole to the x-ray edge singularity.
abstract: We show how the classic approach of Nozières and di Domenicis for treating the edge singularity in x-ray absorption and emission can be generalized to treat the more complex case of the resonant inelastic x-ray scattering (RIXS) process, including effects of the intermediate states involved therein in the presence of the core hole. We solve our lattice model essentially exactly (numerically) to obtain a novel form of edge singularity at the RIXS threshold energy. Our RIXS spectrum naturally includes both the well and poorly screened spectral components and their dispersions and allows its separation into pair and multiple-pair excitations.
authors: Physics Department, Northeastern University, Boston, Massachusetts 02115, USA.
authors: R S
authors: RS
authors: Markiewicz
authors: Department of Physics, University of Washington, Seattle, Washington 98195, USA.
authors: J J
authors: JJ
authors: Rehr
authors: Physics Department, Northeastern University, Boston, Massachusetts 02115, USA.
authors: A
authors: A
authors: Bansil
mesh_terms: D004548:Elasticity; D008670:Metals / Q000737:chemistry*; D008956:Models, Chemical; D014961:X-Ray Diffraction / Q000379:methods*
chemical_list: D008670:Metals