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Complex Dynamics of Glass-Forming LiquidsA Mode-Coupling Theory$
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Wolfgang Götze

Print publication date: 2008

Print ISBN-13: 9780199235346

Published to Oxford Scholarship Online: May 2009

DOI: 10.1093/acprof:oso/9780199235346.001.0001

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Glassy Dynamics of Liquids–Facets of the Phenomenon

Glassy Dynamics of Liquids–Facets of the Phenomenon

(p.1) 1 Glassy Dynamics of Liquids–Facets of the Phenomenon
Complex Dynamics of Glass-Forming Liquids

Wolfgang Götze

Oxford University Press

This chapter presents an elementary discussion of some glassy-dynamics features, which are exhibited by experimental data and by molecular-dynamics-simulation results. The outstanding property of this slow dynamics is the stretching of the relaxation functions on time intervals covering several orders of magnitude. The evolution of the complex relaxation patterns upon compressing or cooling the liquid appear as precursors of hidden liquid–glass transitions, which are characterized by certain crossover values for the density or temperature, respectively. The repulsion-induced cage effect in the systems causes relaxation plateaus and the interplay of two power-law decay processes. If the repulsive interaction is complemented by a strong short-range attraction, the plateaus can disappear and the correlations exhibit logarithmic decay.

Keywords:   relaxation stretching, glass transition, crossover density, crossover temperature, cage effect, relaxation plateau, power-law-decay, logarithmic decay

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