It was noted that understanding the conduction mechanism in such glasses was one of the great challenges in the physics and chemistry of glasses. It was shown that the application of routine percolation theory to the usual random-energy model led to a consistent description of the most puzzling conduction effects concerning both direct- and alternating-current conductivity. The results provided a general basis for the study of transport phenomena in ionic glasses.

On the Conduction Mechanism in Ionic Glasses. H.Cordes, S.D.Baranovskii: Physica Status Solidi B, 2000, 218[1], 133-8