A model was presented, for alternating-current conduction in ionically conducting solids, that took account - in a simple way – of the interaction between carriers. The Coulomb force formed a so-called ionic atmosphere that exerted a restoring force on a central ion whose motion corresponded to an overdamped oscillator. The effect of relaxation of the ionic atmosphere was considered by introducing an additional equation for the displacement of the potential towards the particle position. The general behavior of the alternating-current conductivity could be understood in terms of 2 types of motion: motion of the bound ion at high frequencies (determined by microscopic friction) and a much slower motion, coupled to the surrounding carriers’ relaxation, at low frequencies.

Simple Model for AC Ionic Conduction in Solids. J.Bisquert, V.Halpern, F.Henn: Journal of Chemical Physics, 2005, 122[15], 151101