Model Potential Calculation of the Raman Tensor for Be, Mg, and Zn

Abstract

A model potential calculation of the first derivative of the electronic polarizability with respect to an atomic displacement for Be, Mg, and Zn is presented. The magnitudes of these derivatives, which govern the intensity of the first-order Raman effect in the corresponding crystals at the argon-ion laser wavelength of 4880 Å, are 39.7 ${\mathrm{\AA }}^2$ for Be, 11.2 ${\mathrm{\AA }}^2$ for Mg, and 18.9 ${\mathrm{\AA }}^2$ for Zn. The dependence of the real and imaginary parts of the polarizability derivative on the frequency of the incident light has also been calculated for these crystals.