In order to explore the cause of a recently discovered non-Arrhenius behavior of the direct-current conductivity in such conductors at high temperatures, Monte Carlo simulations were made of the transport of charged particles in an energetically disordered structure. It was shown that the combined effects of Coulomb interaction and disorder could account for the experimental findings. The results suggested that glassy super-ionic conductors could be optimized by decreasing the degree of energetic disorder. However, ionic interaction effects set an upper bound on the high-temperature conductivity.

P.Maass, M.Meyer, A.Bunde, W.Dieterich: Physical Review Letters, 1996, 77[8], 1528-31