Parameterless Explanation of the Non-Arrhenius Conductivity in Glassy Fast Ionic Conductors

Kincs and Martin [Phys. Rev. Lett. 76, 70 (1996)] have recently discovered a ubiquitous non-Arrhenius temperature dependence of the ionic conductivity in glassy fast ionic conductors when the conductivity exceeds the high level of ${10}^{-3\mathrm{}}$ to ${10}^{-2\mathrm{}}{\Omega }^{-1\mathrm{}}{\mathrm{cm}}^{-1\mathrm{}}$. This important experimental discovery is readily explained and reproduced quantitatively by the coupling scheme without the use of any adjustable parameter.