Viscoelasticity of 2D liquids quantified in a dusty plasma experiment

Abstract

The viscoelasticity of two-dimensional liquids is quantified in an experiment using a dusty plasma. An experimental method is demonstrated for measuring the wavenumber-dependent viscosity, $\eta (k)$, which is a quantitative indicator of viscoelasticity. Using an expression generalized here to include friction, $\eta (k)$ is computed from the transverse current autocorrelation function (TCAF), which is found by tracking random particle motion. The TCAF exhibits an oscillation that is a signature of elastic contributions to viscoelasticity. Simulations of a Yukawa liquid are consistent with the experiment.

arXiv comment5 pages text, 3 figures, 1 supplementary material, in press Physical Review Letters 2010

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Cited by in corpus (24)

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• Experimental demonstration of a dusty plasma ratchet rectification and its reversal
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• Superdiffusion of 2D Yukawa liquids due to a perpendicular magnetic field
• Microscopic Origin of Shear Relaxation in Strongly Coupled Yukawa Liquids
• Energy Transport in a Shear Flow of Particles in a 2D Dusty Plasma
• Frequency-dependent shear viscosity of a liquid 2D dusty plasma
• Phonon spectra of two-dimensional liquid dusty plasmas on a one-dimensional periodic substrate
• Depinning dynamics of two-dimensional dusty plasmas on a one-dimensional periodic substrate
• Structures and Diffusion of Two Dimensional Dusty Plasmas on One Dimensional Periodic Substrates
• Viscosity calculated in simulations of strongly-coupled dusty plasmas with gas friction
• Interplay of single particle and collective response in molecular dynamics simulation of dusty plasma system
• Dynamical states in two-dimensional charged dust particle clusters in plasma medium
• Continuous and Discontinuous Transitions in the Depinning of Two-Dimensional Dusty Plasmas on a One-Dimensional Periodic Substrate
• Machine learning in the study of phase transition of two-dimensional complex plasmas
• Structure and thermodynamics of two dimensional Yukawa liquids
• Directional Locking in a 2D Yukawa Solid Modulated by a 2D Periodic Substrate
• The rheology of confined colloidal hard discs
• Phonon spectra of a two-dimensional solid dusty plasma modified by two-dimensional periodic substrates
• Tracking shocked dust: state estimation for a complex plasma during a shock wave
• Experiment and model for a Stokes layer in a strongly coupled dusty plasma
• Superlubric-pinned transition of a two-dimensional solid dusty plasma under a periodic triangular substrate
• Dynamical commensuration effect in a two-dimensional Yukawa solid modulated by periodic substrates