Contribution to the theory of dielectric relaxation in polar media

Abstract

A discussion of the connection between the frequency dependent dielectric constant ε and the short range orientational correlation function d is given for a simple model of polar media. The introduction of separate spatial regions with the attendent difficulties in determining the connection between their (time dependent) correlation functions is avoided by noting that ε must satisfy two relations. The use of these relations allows the long range orientational correlations to be eliminated from the expression for ε, the resulting ε being given as a function of d. The result is a generalization of that given by Nee and Zwanzig [J. Chem. Phys. 52, 6353 (1970)]. A short discussion of the results is given, including a physical picture of the connection between the long and short range orientational correlations.