Polarization Waves in Solids

Abstract

A general theory of the polarization waves in crystals is developed in connection with the optical and the dielectric properties of the crystals. The result includes, in more general form, the relations by Szigeti and Fröhlich about the lattice vibrations in ionic crystals and the theory by Heller and Marcus for the exciton. The theory is applied to the analysis of the infra-red data of BaTiO 3 -type crystals.