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Issue 33, 2016
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Dressed active particles in spherical crystals

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We investigate the dynamics of an active particle in two-dimensional spherical crystals, which provide an ideal environment to illustrate the interplay between active particles and crystallographic defects. A moving active particle is observed to be surrounded by localized topological defects, becoming a dressed active particle. Such a physical picture characterizes both the lattice distortion around the moving particle and the healing of the distorted lattice in its trajectory. We find that the dynamical behaviors of an active particle in both random and ballistic motions uniformly conform to this featured scenario, whether the particle is initially a defect or not. We further observe that the defect pattern around a dressed ballistic active particle randomly oscillates between two well-defined wing-like defect motifs regardless of its speed. The established physical picture of dressed active particles in this work partially deciphers the complexity of the intriguing nonequilibrium behaviors in active crystals, and opens the promising possibility of introducing the activity to engineer defects, which has strong connections with the design of materials.

Graphical abstract: Dressed active particles in spherical crystals

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Publication details

The article was received on 26 May 2016, accepted on 22 Jul 2016 and first published on 22 Jul 2016

Article type: Paper
DOI: 10.1039/C6SM01216G
Citation: Soft Matter, 2016,12, 7020-7027
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    Dressed active particles in spherical crystals

    Z. Yao, Soft Matter, 2016, 12, 7020
    DOI: 10.1039/C6SM01216G

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