Regensburg 1998 – scientific programme
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DY: Dynamik und Statistische Physik
DY 15: Gläser II
DY 15.2: Talk
Monday, March 23, 1998, 14:45–15:00, H2
Glass transition in a Fredrickson Model with long and short ranged interactions — •Bo Zheng and Michael Schulz — Fachbereich Physik, Universität Halle, 06099 Halle (Saale)
The addition of ferromagnetic short ranged interactions and stochastic long ranged interactions with an antiferromagnetic coupling (modeling the amorphous structure of a glass) to the neighbor-facilitated Fredrickson model shows the existence of a nearly non-activated relaxation for T<Tc simultaneously with the main α-process. A typical curvature is found for the α-process in the lnτ versus T−1 plot, which shows a crossover to an Arrhenius-behavior for low T and finite coupling constants.