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Surface depinning of smectic-A edge dislocations | | M Slavinec
; S Kralj
; S Zumer
; T J Sluckin
; | | Date: |
28 Feb 2001 | | Journal: | Phys Rev E, 63 (3 Pt 1), 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. | | Source: | PubMed, pmid11308664 | | Services: | Forum | Review | Favorites | |
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