Surface depinning of smectic-A dislocations
Surface depinning of smectic-A dislocations
Using a Landau–de Gennes approach, we model the formation of an edge dislocation in a smectic-A cell initially in the bookshelf structure. The driving force is the mismatch between the layer thickness in a bulk smectic-A liquid crystal and that imposed by confining plates. The core structure of the dislocation is calculated taking into account spatial variations of the smectic translational order parameter. We numerically determine the critical condition for the surface-driven formation and depinning of the dislocation. By exploiting this phenomenon, we show how the value of the positional anchoring strength at the surface can be determined.
031705-[6pp]
Slavinec, M.
0365ce01-efc8-4bd0-a940-c20e28094552
Kralj, S.
638e12ae-6365-443a-9a98-6039859df897
Zumer, S.
cbb96b95-ff71-4da8-8752-9121913e3e50
Sluckin, T.J.
8dbb6b08-7034-4ae2-aa65-6b80072202f6
2001
Slavinec, M.
0365ce01-efc8-4bd0-a940-c20e28094552
Kralj, S.
638e12ae-6365-443a-9a98-6039859df897
Zumer, S.
cbb96b95-ff71-4da8-8752-9121913e3e50
Sluckin, T.J.
8dbb6b08-7034-4ae2-aa65-6b80072202f6
Slavinec, M., Kralj, S., Zumer, S. and Sluckin, T.J.
(2001)
Surface depinning of smectic-A dislocations.
Physical Review E, 63 (3), .
(doi:10.1103/PhysRevE.63.031705).
Abstract
Using a Landau–de Gennes approach, we model the formation of an edge dislocation in a smectic-A cell initially in the bookshelf structure. The driving force is the mismatch between the layer thickness in a bulk smectic-A liquid crystal and that imposed by confining plates. The core structure of the dislocation is calculated taking into account spatial variations of the smectic translational order parameter. We numerically determine the critical condition for the surface-driven formation and depinning of the dislocation. By exploiting this phenomenon, we show how the value of the positional anchoring strength at the surface can be determined.
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Published date: 2001
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Local EPrints ID: 29584
URI: http://eprints.soton.ac.uk/id/eprint/29584
ISSN: 1539-3755
PURE UUID: 4a945f51-accd-45b3-b30a-12c3bda565d6
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Date deposited: 12 May 2006
Last modified: 16 Mar 2024 02:32
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Author:
M. Slavinec
Author:
S. Kralj
Author:
S. Zumer
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