Spatially Heterogeneous Dynamics at the Nanoscale: Insights from Simulation
S C. Glotzer
We review our recent theoretical and simulation work on dynamical heterogeneity and correlated particle motion in glass-forming liquids and polymers. We describe evidence for growing mobility fluctuations in these systems with decreasing temperature, and the relationship between dynamical heterogeneity and decoupling of diffusion and structural relaxation. We also briefly discuss the relationship between dynamical heterogeneity, string-like collective motion, the clustering of strings, and mode coupling theory.