Exhausting of Fluctuating Free Volume of Dynamic Glass Transition at Low TemperaturesE. Donth
Universität Halle, Fachbereich Physik, 06099 Halle (Saale), Germany
Received 29 December 1995, revised 14 March 1996, accepted 13 May 1996
The conventional free volume, usually externally given by hand, is substituted by an internal fluctuating free volume. The temperature dependence of this free volume can be calculated from the transition to Levy stable distributions assuming dominance of fluctuations in functional subsystems. An exhausting temperature is obtained (well above the Vogel temperature) where this free volume becomes practically zero. A cellular pattern fluctuating in space and time is suggested for the dynamic glass transition. Partial freezing-in of the cells can qualitatively explain several fundamental properties of glasses.
© Les Editions de Physique 1996