Saliy Y. Formation of defects subsystem and electrical properties of IV-VI compounds films.

The dissertation is devoted to complex investigations of defects subsystem formation and electrical properties of films on the basis of IV-VI compounds. The kinetics of unstable crystal defects on the growth, annealing or by radiation influences is investigated both experimental, theoretical methods and the computer simulation of processes.To study the structural and energetical parameters of the crystal and its defect subsystem by molecular - dynamics simulations it is necessary to define the interaction potentials and interacting structural particles. It is proposed the parameter K to determine the model of the potential - particle to investigate lead and tin chalcogenide crystals with the structure of NaCl. This parameter is calculated using the experimental data what are the nearest - neighbour distance, the lattice energy and the bulk modulus. The influence of the central interatomic potential on formation of the stable structure: NaCl and BaF2 have been investigated. The type of structures produced depends on the charge of ions