Abstract
The electronic structures of titanium nitrides have been investigated by x-ray photoelectron spectroscopy over the entire composition range of the rocksalt structure (). The valence-region spectrum of stoichiometric TiN is consistent with results of band-structure calculations. The filling of a defect state at about 2-eV binding energy with decreasing is explicitly demonstrated. Experimental results are compared with different models for calculation of the electronic structure of anion-deficient rocksalt transition-metal compounds. Variation of the core-level binding energies indicates a decrease of the ionicity in with decreasing . The Ti satellite structure found for nearly stoichiometric samples is discussed in terms of screening of the core hole by the conduction electrons.
- Received 27 December 1982
DOI:https://doi.org/10.1103/PhysRevB.28.3214
©1983 American Physical Society