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Dynamics of Annihilation Process of Disclination Pairs in Nematic Liquid Crystals

Dynamics of Annihilation Process of Disclination Pairs in Nematic Liquid Crystals Abstract We investigated the dynamics of annihilation process of a defect pair in the nematic phase which were generated as type-1 wedge disclinations by quenching the isotropic phase. We measured the time dependence of the distance between a defect pair with or without external electric field. The distance decreased linearly with time immediately after the defect pair was generated (the early stage) and then decreased to zero in proportion to the square root of the time to elapse before the defect pair was annihilated (the late stage). We also treated the annihilation dynamics by numerical simulation with a two-dimensional phenomenological equation of motion, and the simulation results were in good agreement with the experimental ones. The ratio of the coefficient of viscosity to that of elasticity and the strength of ordering field were evaluated from the comparison between the simulation and experimental results. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals Taylor & Francis

Dynamics of Annihilation Process of Disclination Pairs in Nematic Liquid Crystals

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References (17)

Publisher
Taylor & Francis
Copyright
Copyright Taylor & Francis Group, LLC
ISSN
1058-725X
DOI
10.1080/10587259708041847
Publisher site
See Article on Publisher Site

Abstract

Abstract We investigated the dynamics of annihilation process of a defect pair in the nematic phase which were generated as type-1 wedge disclinations by quenching the isotropic phase. We measured the time dependence of the distance between a defect pair with or without external electric field. The distance decreased linearly with time immediately after the defect pair was generated (the early stage) and then decreased to zero in proportion to the square root of the time to elapse before the defect pair was annihilated (the late stage). We also treated the annihilation dynamics by numerical simulation with a two-dimensional phenomenological equation of motion, and the simulation results were in good agreement with the experimental ones. The ratio of the coefficient of viscosity to that of elasticity and the strength of ordering field were evaluated from the comparison between the simulation and experimental results.

Journal

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid CrystalsTaylor & Francis

Published: Aug 1, 1997

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