Photoemission Partial State Densities of Overlapping p and d States for NiO, CoO, FeO, MnO, and Cr2O3

Abstract

We report partial densities of states of overlapping bandlike $p$ states and localized $d$ states in several insulating transition-metal oxides which have been determined from frequency-dependent photoemission spectra taken in the range 5-90 eV. We observe that $p$-band features become weak relative to $d$-state and satellite features at high frequencies, i.e., at x-ray photoemission frequencies. Partial $d$-state densities together with a ligandfield description are reported which give a basis for evaluating recent theoretical descriptions of transition-metal oxides.