ANGULAR-DEPENDENT SOFT-X-RAY ABSORPTION-SPECTROSCOPY OF V2O5 AND V6O13

We have measured the V 2p(3/2) and O 1s X-ray absorption spectra of si ngle crystal V2O5 and V6O13 and compared to linear combinations of ato mic orbitals (LCAO) density of slates (DOS) calculations. The spectra change dramatically with incident angle. The use of polarized light an d a single crystal limits the number of transitions possible, revealin g spectral features that cannot be resolved on polycrystals (angle-int egrated). The measured O 1s and V 2p(3/2) spectra agree with the proje cted unoccupied O 2p and V 3d DOS, respectively, indicating that atomi c and solid state effects, including V-O hybridization, must be includ ed to describe adequately the spectra.