EXPERIMENTAL AND THEORETICAL-STUDY OF THE ELECTRONIC-STRUCTURE OF ION-BEAM-SYNTHESIZED SUBSTOICHIOMETRIC TITANIUM CARBIDES

Non-stoichiometric titanium carbide layers TiCx with x = 0.26, 0.49 an d 0.78 have been synthesized by multiple-energy carbon-ion implantatio n at the surface of pure titanium. Changes in the binary alloy electro nic properties Versus defect concentration are studied by core Ti2p an d valence X-ray photoemission spectroscopy (XPS). A self-consistent Ti ght Binding Linear Muffin Tin Orbital (TB-LMTO) calculation with empty spheres in place of the missing carbon atoms (i.e. C1-x) gives the to tal density of occupied states in comparison with observed XPS. (C) 19 97 Elsevier Science B.V.