Surface depinning of smectic-A dislocations

Slavinec, M., Kralj, S., Zumer, S. and Sluckin, T.J. (2001) Surface depinning of smectic-A dislocations. Physical Review E, 63, (3), 031705-[6pp]. (doi:10.1103/PhysRevE.63.031705).


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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.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1103/PhysRevE.63.031705
ISSNs: 1539-3755 (print)
Related URLs:
Subjects: Q Science > QA Mathematics
Divisions : University Structure - Pre August 2011 > School of Mathematics > Applied Mathematics
ePrint ID: 29584
Accepted Date and Publication Date:
Date Deposited: 12 May 2006
Last Modified: 31 Mar 2016 11:55

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