Lattice vibrations in ternary II-VI compounds

Abstract
The ratio of the difference between the LO-phonon frequencies to the sum of these frequencies of the pure constituent crystals is proposed as an a priori indication for the classification of the ternary compounds as amalgamated- or persistent-type crystals. This criterion has been found to be valid for all the investigated II-VI compound mixed single crystals, and is explained in the framework of a diatomic linear-chain model and the localization of phonons.