Effect of nitrogen concentration on mechanical properties of GaAs1−xNx dilute alloys

Using the pseudopotential method within the virtual crystal approximation combined with the Harrison bond-orbital model, we have studied the effect of nitrogen content x (0 < x ≤ 0.05) on mechanical properties of GaAs1−xNx dilute alloys in zinc-blende structure. The agreement between our results and the available experimental data is found to be satisfactory. We have found that except for the anisotropy factor and the [1 0 0] Poisson ratio, the incorporation of only a few percentage of nitrogen affects the mechanical properties being studied here. In addition, the effect of compositional disorder on the calculated parameters has been examined and found to have an important effect on most studied quantities.