Viscous Decoupling Transitions for Individually Dragged Particles in Systems with Quenched Disorder
arXiv:0804.1972 · doi:10.1103/PhysRevE.78.011402
Abstract
We show that when an individual particle is dragged through an assembly of other particles in the presence of quenched disorder, a viscous decoupling transition occurs between the dragged particle and the surrounding particles which is controlled by the quenched disorder. A counterintuitive consequence of this transition is that the velocity of the dragged particle can be increased by increasing the strength or density of the quenched disorder. The decoupling transition can also occur when the external drive on the dragged particle is increased, and is observable as a clear signature in the velocity-force response.
4 pages, 3 postscript figures
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- Commensuration Effects on Skyrmion Hall Angle and Drag for Manipulation of Skyrmions on Two-Dimensional Periodic Substrates
- Colloidal Lattice Shearing and Rupturing with a Driven Line of Particles
- Fluctuations and Pinning for Individually Manipulated Skyrmions
- Active Rheology and Anti-Commensuration Effects For Driven Probe Particles on Two Dimensional Periodic Pinning Substrates