Abstract
AbstractLattice dynamics of ZnS(II–VI), GaAs(III–V), and GaSb(III–V) compounds is investigated using an eight‐parameter bond‐bending force model (BBFM) recently developed for II–VI and III‐V compounds having zincblende (ZB) structure. The total potential energy of the system embodies three types of interactions which give rise to central (radial), bond‐bending, and long‐range forces. The model involves in total eight disposable parameters which are calculated by making use of six critical‐point phonon frequencies, two elastic constants, and the lattice equilibrium condition. The model is physically correct as it satisfies all the symmetry requirements of a perfect crystal. The phonon dispersion relations, phonon density of states, and temperature variation of the Debye characteristic temperature of the above‐mentioned crystals are calculated. Theoretical results are compared with the available experimental data. A fairly good agreement is observed between theory and experiments and thus lends support to the success of the dynamical calculations.
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