The (100) surface of substoichiometric TiN has been studied in normal emission utilizing synchro- tron radiation for photon energies above 27 eV. In order to interpret the spectral features in the experimental data, comparisons with band-structure results and theoretical photoemission spectra calculated for stoichiometric composition are made. A nondispersive structure is observed at about 2-eV binding energy in the recorded spectra and is interpreted as a vacancy-induced state. Its intensity variation with photon energy has been studied and is compared with a resonant enhancement of the emission from states close to the Fermi energy for photon energies between 39 and 51 eV.
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Lindberg et al. (1987) studied this question.
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