Partial contributions to the valence band of MO2, RuO2, and Rh2O3: Cooper minimum and extended cluster model calculations

Abstract

We studied the partial contributions to the valence band spectra of MoO2, RuO2 and Rh2O3. The experimental technique of choice was the Cooper minimum method to X-ray photoemission spectroscopy. The spectra were interpreted with an extended cluster model and compared to usual band structure calculations. We conclude that, for the correct description of the valence band, one must include charge transfer, final-state and many-body effects in the description of the electronic structure of these compounds, which can also be extended to other systems.