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Active fluidization in dense glassy systems

Mandal, Rituparno and Bhuyan, Pranab Jyoti and Rao, Madan and Dasgupta, Chandan (2016) Active fluidization in dense glassy systems. In: SOFT MATTER, 12 (29). pp. 6268-6276.

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Official URL: http://dx.doi.org/10.1039/c5sm02950c

Abstract

Dense soft glasses show strong collective caging behavior at sufficiently low temperatures. Using molecular dynamics simulations of a model glass former, we show that the incorporation of activity or self-propulsion, f(0), can induce cage breaking and fluidization, resulting in the disappearance of the glassy phase beyond a critical f(0). The diffusion coefficient crosses over from being strongly to weakly temperature dependent as f(0) is increased. In addition, we demonstrate that activity induces a crossover from a fragile to a strong glass and a tendency of active particles to cluster. Our results are of direct relevance to the collective dynamics of dense active colloidal glasses and to recent experiments on tagged particle diffusion in living cells.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ROYAL SOC CHEMISTRY, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 08 Oct 2016 06:27
Last Modified: 08 Oct 2016 06:27
URI: http://eprints.iisc.ac.in/id/eprint/54725

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