Abstract
We present experimental and theoretical results on CoO resonant Raman scattering (RRS) with excitation at many values in the whole region, and with a final state containing a hole. The theory includes the final-state interaction between the configurations with one hole and that with two holes [configuration interaction (CI)]. A cluster calculation with CI reproduces the experimental results with excitation spanning the whole region. In the region the theory reproduces the evolution of the RRS doublet at higher outgoing energy. On this basis the role of CI and of the ligand hole effects are discussed vs the excitation energy. At least 5 eV above the threshold, the experimental results show also a nondispersive component, with the intensity rapidly increasing with the excitation energy. The position and shape of this component are well reproduced by a model calculation accounting for all possible partitions between the transitions to the continuum and to the shell. However, the intensity of the calculated nondispersive component is about an order of magnitude smaller than the measured one. The implications of this fact in terms of the dynamics of the intermediate state are outlined.
- Received 22 September 2000
DOI:https://doi.org/10.1103/PhysRevB.63.245115
©2001 American Physical Society