Optical deformation potential constant for non-polar optical phonon scattering in the valence band of alloy semiconductors

The strength of the non-polar optical phonon scattering in the valence band of semiconductors is determined by using the optical deformation potential constant. The optical deformation potential constant for alloy semiconduct ors turns out to be a function of the angular frequencies of the non-polar optical and acoustic phonons. The dependence of the angular frequency on th e atomic masses and the composition ratios is obtained by making use of a l inear spring model. The optical deformation potential constant expressed in terms of atomic masses and composition ratios can be used for non-polar op tical phonon scattering in alloy semiconductors with special regard paid to the fact that atoms are randomly distributed.