ملخص: The pressure dependence of electronic and positron charge densities as a function of atomic position in the unit cell for ZnSe, CdSe and their alloy Zn0.5Cd0.5Se have been computed using the empirical pseudopotential method in combination with the virtual crystal approximation. The calculated results of the positron charge density reflect the high insight for the annihilation effect. The effect of pressure on the ionicity factor under pressure effect is presented. This factor has been calculated by means of an empirical model. The structural phase transition can be seen easily from the behaviour of the bonding character. The results are compared with other theoretical calculations and experimental data and are in reasonable agreement.

لغة: إنجليزية