Abstract
We have performed the
sp
3s
∗
semi-empirical tight-binding method (TB) with the scaling law and the Murnaghan's equation of state (EOS) in order to study the electronic structure of zinc blend CdTe and ZnTe under hydrostatic pressure effect. We have determined the nonlinear pressure dependence of the direct band gap. We have shown that the nonlinear increase of the direct gap is dominated by that of
s–
s interaction. Several hydrostatic deformation potential constants are determined. Results are in good agreement with experimental and other theoretical works.