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Propagating director bend fluctuations in nematic liquid crystals

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Allen, M. P. and Humpert, Anja (2015) Propagating director bend fluctuations in nematic liquid crystals. Physical Review Letters, 114 (2). 028301. doi:10.1103/PhysRevLett.114.028301 ISSN 0031-9007.

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.114.028301

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Abstract

We show, by molecular simulation, that for a range of standard, coarse-grained, nematic liquid crystal models, the director bend fluctuation is a propagating mode. This is in contrast to the generally-accepted picture of nematic hydrodynamics, in which all the director modes (splay, twist, bend, and combinations thereof) are overdamped. By considering the various physical parameters that enter the equations of nematodynamics, we propose an explanation of this effect, and conclude that propagating bend fluctuations may be observable in some experimental systems.

Item Type: Journal Article
Subjects: Q Science > QA Mathematics
Q Science > QC Physics
Q Science > QD Chemistry
Divisions: Faculty of Science, Engineering and Medicine > Science > Physics
Library of Congress Subject Headings (LCSH): Liquid crystals
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 14 January 2015
Dates:
DateEvent
14 January 2015Published
17 December 2014Accepted
3 October 2014Submitted
Volume: 114
Number: 2
Number of Pages: 12
Article Number: 028301
DOI: 10.1103/PhysRevLett.114.028301
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 28 December 2015
Date of first compliant Open Access: 28 December 2015
Funder: Engineering and Physical Sciences Research Council (EPSRC)

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