Dresden 2006 – scientific programme

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DF: Dielektrische Festkörper

DF 5: Glass I (together with division ‘Dynamics and Statistical Physics’ [DY])

DF 5.4: Talk

Tuesday, March 28, 2006, 10:50–11:10, M{\"U}L Elch

Theoretical model of the conductivity of alkali glasses — •Joachim Sohns and Michael Schulz — Abteilung theoretische Physik, Albert-Einstein-Allee 11, 89069 Ulm

Our aim is to formulate a model of the conductivity of glasses which reproduces the mixed alkali effect. Therefore we analyze the conductivity of an ensemble of charged particles in a random environment. As in a former model this environment was static, the model proposed here includes the dynamics of the glass environment. The memory effects are described by the mode-coupling theory. A nonequilibrium Green function determines the properties of the alkali system. Finally the conductivity of the system is calculated. Furthermore, we give some ideas how feedback mechanisms between the ions and the glass environment may be included in the theoretical description.