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Anisotropic shear melting and recrystallization of a two-dimensional complex plasma

Anisotropic shear melting and recrystallization of a two-dimensional complex plasma A two-dimensional plasma crystal was melted by suddenly applying localized shear stress. A stripe of particles in the crystal was pushed by the radiation pressure force of a laser beam. We found that the response of the plasma crystal to stress and the eventual shear melting depended strongly on the crystal's angular orientation relative to the laser beam. Shear stress and strain rate were measured, from which the spatially resolved shear viscosity was calculated. The latter was shown to have minima in the regions with highest strain rate, thus demonstrating shear thinning. Shear-induced reordering was observed in the steady-state flow, where particles formed strings aligned in the flow direction. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review E American Physical Society (APS)

Anisotropic shear melting and recrystallization of a two-dimensional complex plasma

Physical Review E , Volume 87 (4) – Apr 1, 2013
7 pages

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References (33)

Publisher
American Physical Society (APS)
Copyright
Copyright © 2013 The American Physical Society
ISSN
1550-2376
DOI
10.1103/PhysRevE.87.043115
pmid
23679537
Publisher site
See Article on Publisher Site

Abstract

A two-dimensional plasma crystal was melted by suddenly applying localized shear stress. A stripe of particles in the crystal was pushed by the radiation pressure force of a laser beam. We found that the response of the plasma crystal to stress and the eventual shear melting depended strongly on the crystal's angular orientation relative to the laser beam. Shear stress and strain rate were measured, from which the spatially resolved shear viscosity was calculated. The latter was shown to have minima in the regions with highest strain rate, thus demonstrating shear thinning. Shear-induced reordering was observed in the steady-state flow, where particles formed strings aligned in the flow direction.

Journal

Physical Review EAmerican Physical Society (APS)

Published: Apr 1, 2013

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