Abstract
Abstract : The dielectric and infrared (lattice dynamic) properties of the cubic IV-VI compound semiconductors are reviewed. The values of macroscopic dynamic ionic charge are found to be appreciably larger than the corresponding values for alkali halide and zincblende type crystals. The large values of e(T)*, which arise from the redistribution of electronic charge, provide further indication that the atomic dipole Lorentz field is the 'destabilizing' factor responsible for the low values of omega(T) in the IV-VI compounds. (Author)
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