Slow Plastic Deformation (Creep) of 2D Dusty Plasma Solids
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Authors
Hartmann, Peter
Kovacs, Aniko Zs.
Douglass, Angela Michelle.
Carmona-Reyes, Jorge
Matthews, Lorin Swint.
Hyde, Truell Wayne.
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Physical Review Letters
Abstract
We report complex plasma experiments, assisted by numerical simulations, providing an alternative qualitative link between the macroscopic response of polycrystalline solid matter to small shearing forces and the possible underlying microscopic processes. In the stationary creep regime we have determined the exponents of the shear rate dependence of the shear stress and defect density, being α=1.15±0.1 and β=2.4±0.4, respectively. We show that the formation and rapid glide motion of dislocation pairs in the lattice are dominant processes
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Phys Rev Letters, 113, 025002, 2014