ELECTRONIC-ENERGY STRUCTURE OF THE TERNARY CARBIDE SYSTEM TI-AL-C

With the coherent potential method of the multiple scattering theory t he electronic structure of the ternary carbide system Ti1-xAlxC (x = 0 .17) is calculated. The cluster approximation with muffin-tin crystal potential is used. With the same method the electronic structure of th e binary TIC system has been calculated for comparison. It was found t hat Ti1-xAlxC (x = 0.17) can be considered as a semiconductor with a n arrow energy gap (2.18 eV). Aluminium doping results in an increase of the valence band width and a decrease of the cohesive energy.