Abstract
The elastic shear constants, C 11, C 12 and C 44, internal-strain parameters, and deformation potentials at the valence-band maximum are calculated for cubic ZnS and ZnSe under hydrostatic pressure. Also optical-phonon frequencies and Grüneisen parameters are derived. The calculations are performed within the local approximation to the density functional theory, and the one-electron equations are solved by means of the full potential linear muffin-tin-orbital method.
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