Defect Turbulence in Quasi-2D Creeping Dusty-Plasma Liquids

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We report the intermittent and heterogeneous plastic structural rearrangement at the kinetic level in a quasi-2D creeping dusty-plasma Coulomb liquid through directly tracking each particle trajectory and measuring the evolution of each associated local bond-orientational order. The thermal agitation and external shear have comparable strengths. Their interplay with the Coulomb coupling enhances particle hopping, and induces the loss of local structural memory and avalanche-type excitation of topological defect clusters following the universal scaling behaviors of cluster size in [Formula presented] space, akin to the generic behavior of self-organized criticality. Increasing shear tends to reduce the aspect ratio of the temporal to the spatial spans of the defect cluster in [Formula presented] space.

Original languageEnglish
Article number065003
JournalPhysical Review Letters
Issue number6
StatePublished - 2004


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