Abstract
We present and discuss the Ti 2 p and O 1 s X-ray absorption spectra (XAS) and resonant photoelectron emission spectra (RPES) of the various polymorphic forms (TiO 2-II, rutile and anatase) of TiO 2. The largest differences between the Ti 2 p XAS of polymorphs of TiO 2 are observed in the region of the double peak structure of the L 3 edge. A strong delocalization of the excited 3 d electron in this region is concluded from the RPES at the L 3 threshold of Ti. The differences in XAS are attributed to increasing strength of the crystal field caused by delocalization of the excited 3 d electron.
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