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Heterogeneous dynamics of coarsening systems.
P Mayer1, H Bissig, L Berthier
1Department of Mathematics, King's College, Strand, London, WC2R 2LS, United Kingdom.
Physical Review Letters
|September 28, 2004
Summary
Slow dynamics in coarsening systems exhibit dynamic heterogeneity, mirroring behaviors seen in glass-forming systems. This was confirmed through experiments, theory, and simulations using novel multipoint functions to analyze fluctuations.
Area of Science:
- Physics
- Materials Science
Background:
- Coarsening systems, such as foams, exhibit slow dynamics.
- Glass-forming systems are known for their dynamic heterogeneity.
- Understanding dynamic heterogeneity is crucial for materials science.
Purpose of the Study:
- To investigate dynamic heterogeneity in coarsening systems.
- To compare the dynamics of coarsening systems with glass-forming systems.
- To introduce novel methods for quantifying dynamic heterogeneity.
Main Methods:
- Experiments on coarsening foam using time-resolved correlation and light scattering.
- Theoretical study of the Ising model.
- Simulations of coarsening systems.
Main Results:
- Dynamic heterogeneity was observed in coarsening systems, similar to glass-forming systems.
- Novel multipoint functions successfully quantified dynamic heterogeneity.
- Dynamic scaling of fluctuations with domain size was consistent across all studied systems.
Conclusions:
- The slow dynamics of coarsening systems display dynamic heterogeneity.
- The findings suggest a universal behavior in systems with slow dynamics.
- The developed methods provide new tools for studying dynamic correlations.