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Two-temperature activity induces liquid-crystal phases inaccessible in equilibrium

Chattopadhyay, J and Ramaswamy, S and Dasgupta, C and Maiti, PK (2023) Two-temperature activity induces liquid-crystal phases inaccessible in equilibrium. In: Physical Review E, 107 (2).

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Official URL: https://doi.org/10.1103/PhysRevE.107.024701


In equilibrium hard-rod fluids, and in effective hard-rod descriptions of anisotropic soft-particle systems, the transition from the isotropic (I) phase to the nematic phase (N) is observed above the rod aspect ratio L/D=3.70 as predicted by Onsager. We examine the fate of this criterion in a molecular dynamics study of a system of soft repulsive spherocylinders rendered active by coupling half the particles to a heat bath at a higher temperature than that imposed on the other half. We show that the system phase-separates and self-organizes into various liquid-crystalline phases that are not observed in equilibrium for the respective aspect ratios. In particular, we find a nematic phase for L/D=3 and a smectic phase for L/D=2 above a critical activity. © 2023 American Physical Society.

Item Type: Journal Article
Publication: Physical Review E
Publisher: American Physical Society
Additional Information: The copyright for this article belongs to the Authors.
Keywords: Liquid crystals; Molecular dynamics, Aspect-ratio; Hard rod fluids; Hard rods; I-phase; Isotropics; Liquid crystal phase; Liquid crystal phasis; Nematic phasis; Particles system; Soft particles, Aspect ratio
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 21 Feb 2023 03:32
Last Modified: 21 Feb 2023 03:32
URI: https://eprints.iisc.ac.in/id/eprint/80548

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