Regensburg 1998 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

DY: Dynamik und Statistische Physik

DY 15: Gläser II

DY 15.2: Vortrag

Montag, 23. März 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<T_c 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.