Electronic structure investigation of CoO by means of soft x-ray scattering

Abstract

The electronic structure of CoO is studied by resonant inelastic soft x-ray scattering spectroscopy using photon energies across the Co (formula presented) absorption edges. The different energy-loss structures in the Raman scattering spectra are identified as due to (formula presented) and charge-transfer excitations. For excitation energies close to the (formula presented) resonance, the spectral features are dominated by quartet-quartet and quartet-doublet transitions of the (formula presented) configuration. At excitation energies corresponding to the satellites in the Co (formula presented) x-ray-absorption spectrum of CoO, the emission features are instead dominated by charge-transfer transitions to the (formula presented) final state. The spectra are interpreted and discussed with the support of simulations within the single-impurity Anderson model with full multiplet effects which are found to yield consistent spectral functions to the experimental data. © 2002 The American Physical Society.