2010/06/15 by Yan Feng, J. Goree, Bin Liu
Earth and Planetary Sciences · Physics and Astronomy · #Dust and Plasma Wave Phenomena #Earthquake Detection and Analysis #High-pressure geophysics and materials #cond-mat.soft
paper · pdf · doi:10.1103/physrevlett.105.025002
5 pages text, 3 figures, 1 supplementary material, in press Physical Review Letters 2010
arxiv created 2010/06/15 · openalex publication_date 2010/07/09 · arxiv updated 2010/09/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The viscoelasticity of two-dimensional liquids is quantified in an experiment using a dusty plasma. An experimental method is demonstrated for measuring the wave-number-dependent viscosity η(k), which is a quantitative indicator of viscoelasticity. Using an expression generalized here to include friction, η(k) is computed from the transverse current autocorrelation function, which is found by tracking random particle motion. The transverse current autocorrelation function exhibits an oscillation that is a signature of elastic contributions to viscoelasticity. Simulations of a Yukawa liquid are consistent with the experiment.