Abstract
We present O K-edge absorption and emission spectra for α- and obtained using a high-resolution-undulator soft-x-ray radiation source. The occupied and the unoccupied O p densities of states are obtained and compared with the valence-band photoemission results. While these results confirm that α- can be classified as a charge transfer or an intermediate-type insulator, they suggest that is more likely of the Mott-Hubbard type. The excitation-energy dependence of the emission spectra is also discussed.
- Received 22 February 1993
DOI:https://doi.org/10.1103/PhysRevB.48.2109
©1993 American Physical Society