ANGLE-DEPENDENT SOFT-X-RAY ABSORPTION-SPECTROSCOPY OF V2O5

We have measured the V 2p(3/2) and O Is X-ray absorption spectra of si ngle-crystal V2O5 and compared them with linear-combination-of-atomic- orbitals density-of-states (DOS) calculations. The spectra change dram atically with incident angle and the use of polarized light and a sing le crystal limits the number of transitions possible, revealing spectr al features that cannot be resolved using polycrystals (angle integrat ed). The measured O 1s and V 2p(3/2) spectra agree with the projected unoccupied O 2p and V 3d DOSs respectively, indicating that atomic eff ects alone cannot adequately describe the absorption spectrum, but tha t solid-state effects, including V-O hybridization, must be included.