Anomalous Dynamical Responses in a Driven System

Abstract

The interplay between structure and dynamics in non-equilibrium steady-state is far from understood. We address this interplay by tracking Brownian Dynamics trajectories of particles in a binary colloid of opposite charges in an external electric field, undergoing cross-over from homogeneous to lane state, a prototype of heterogeneous structure formation in non-equilibrium systems. We show that the length scale of structural correlations controls heterogeneity in diffusion and consequent anomalous dynamic responses, like the exponential tail in probability distributions of particle displacements and stretched exponential structural relaxation. We generalise our observations using equations for steady state density which may aid to understand microscopic basis of heterogeneous diffusion in condensed matter systems.

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Cited by in corpus (10)

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• Universal spectral features of different classes of random diffusivity processes
• Exact first-passage time distributions for three random diffusivity models
• Perpendicular and Parallel Phase Separation in Two Species Driven Diffusive Lattice Gases
• Length-scales of Dynamic Heterogeneity in a Driven Binary Colloid
• Competition between lanes and transient jammed clusters in driven binary mixtures
• Microscopic Insights into Dynamical Heterogeneity in a Lane-forming Liquid
• Non Gaussian information of heterogeneity in Soft Matter
• Hot crystals of thermo-responsive particles with temperature dependent diameter in presence of a temperature gradient