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Kinetics of the Nematic-Isotropic Interface

Kinetics of the Nematic-Isotropic Interface
Kinetics of the Nematic-Isotropic Interface
We investigate the motion of an interface between a nematic liquid crystal phase and the isotropic phase of the same fluid. In this simplified model we assume the nematic liquid crystal to have one order parameter only and also suppose the system to be isothermal and initially quenched into the metastable régime of the isotropic phase (Tni>T>T*) . What results is the time-dependent Ginzburg-Landau equation, with domain wall solutions, corresponding to phase interfaces, which interpolate between static isotropic and nematic minima. These domain walls move with a unique velocity which depends more or less linearly on the degree of undercooling. For real liquid crystals this velocity is of the order of cm s -1. We also examine the relaxation mode solutions of the Ginzburg-Landau equation, and present a complete phase-diagram of these solutions.
1155-4312
873-884
Popa-Nita, V.
068ec8ef-991a-40da-bbe5-3b2575be71d1
Sluckin, T.J.
8dbb6b08-7034-4ae2-aa65-6b80072202f6
Popa-Nita, V.
068ec8ef-991a-40da-bbe5-3b2575be71d1
Sluckin, T.J.
8dbb6b08-7034-4ae2-aa65-6b80072202f6

Popa-Nita, V. and Sluckin, T.J. (1996) Kinetics of the Nematic-Isotropic Interface. Journal de Physique II, 6, 873-884. (doi:10.1051/jp2:1996216).

Record type: Article

Abstract

We investigate the motion of an interface between a nematic liquid crystal phase and the isotropic phase of the same fluid. In this simplified model we assume the nematic liquid crystal to have one order parameter only and also suppose the system to be isothermal and initially quenched into the metastable régime of the isotropic phase (Tni>T>T*) . What results is the time-dependent Ginzburg-Landau equation, with domain wall solutions, corresponding to phase interfaces, which interpolate between static isotropic and nematic minima. These domain walls move with a unique velocity which depends more or less linearly on the degree of undercooling. For real liquid crystals this velocity is of the order of cm s -1. We also examine the relaxation mode solutions of the Ginzburg-Landau equation, and present a complete phase-diagram of these solutions.

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Published date: 1996

Identifiers

Local EPrints ID: 29560
URI: http://eprints.soton.ac.uk/id/eprint/29560
ISSN: 1155-4312
PURE UUID: 830e6cfb-5174-4490-94df-bc84122d7659
ORCID for T.J. Sluckin: ORCID iD orcid.org/0000-0002-9163-0061

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Date deposited: 09 Jan 2007
Last modified: 16 Mar 2024 02:32

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Author: V. Popa-Nita
Author: T.J. Sluckin ORCID iD

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