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Layered chiral active matter : beyond odd elasticity
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Kole, S. J., Alexander, Gareth P., Ramaswamy, Sriram and Maitra, Ananyo (2021) Layered chiral active matter : beyond odd elasticity. Physical Review Letters, 126 (24). 248001 . doi:10.1103/PhysRevLett.126.248001 ISSN 0031-9007.
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.126.248001
Abstract
In equilibrium liquid crystals, chirality leads to a variety of spectacular three-dimensional structures, but chiral and achiral phases with the same broken continuous symmetries have identical long-time, large-scale dynamics. In this Letter, starting from active model
H
∗
, the general hydrodynamics of a pseudoscalar in a momentum-conserving fluid, we demonstrate that chirality qualitatively modifies the dynamics of layered liquid crystals in active systems in both two and three dimensions due to an active “odder” elasticity. In three dimensions, we demonstrate that the hydrodynamics of active cholesterics differs fundamentally from smectic-A liquid crystals, unlike their equilibrium counterpart. This distinction can be used to engineer a columnar array of vortices, with an antiferromagnetic vorticity alignment, that can be switched on and off by external strain. A two-dimensional chiral layered state—an array of lines on an incompressible, freestanding film of chiral active fluid with a preferred normal direction—is generically unstable. However, this instability can be tuned in easily realizable experimental settings when the film is either on a substrate or in an ambient fluid.
Item Type: | Journal Article | ||||||||||||
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Subjects: | Q Science > QC Physics | ||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||
Library of Congress Subject Headings (LCSH): | Liquid crystals , Chirality | ||||||||||||
Journal or Publication Title: | Physical Review Letters | ||||||||||||
Publisher: | American Physical Society | ||||||||||||
ISSN: | 0031-9007 | ||||||||||||
Official Date: | 18 June 2021 | ||||||||||||
Dates: |
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Volume: | 126 | ||||||||||||
Number: | 24 | ||||||||||||
Article Number: | 248001 | ||||||||||||
DOI: | 10.1103/PhysRevLett.126.248001 | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||||
Copyright Holders: | © 2021 American Physical Society | ||||||||||||
Date of first compliant deposit: | 25 June 2021 | ||||||||||||
Date of first compliant Open Access: | 28 June 2021 | ||||||||||||
RIOXX Funder/Project Grant: |
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