Abstract

Theoretical analyses of resonant X-ray emission spectroscopy (RXES) in rare earth compounds and transition metal compounds are given with an impurity Anderson model using the coherent second order optical formula. RXES provides us with important information on the 4f and 3d electronic states in the ground state of these materials, as well as excited states with and without a core hole. For the analysis of RXES of rare earth systems, the impurity Anderson model (including a single rare earth ion) works well, but we need larger clusters in order to explain some aspects of RXES in transition metal compounds.

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