Defect kinetics and dynamics of pattern coarsening in a two-dimensional smectic-A system

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dc.creatorAbukhdeir, Nasser Mohieddin
dc.creatorRey, Alejandro D
dc.date2008-05-23
dc.date.accessioned2026-07-07T09:47:05Z
dc.date.available2026-07-07T09:47:05Z
dc.descriptionTwo-dimensional simulations of the coarsening process of the isotropic/smectic-A phase transition are presented using a high-order Landau-de Gennes type free energy model. Defect annihilation laws for smectic disclinations, elementary dislocations, and total dislocation content are determined. The computed evolution of the orientational correlation length and disclination density is found to be in agreement with previous experimental observations showing that disclination interactions dominate the coarsening process. The mechanism of smectic disclination movement, limited by the absorption and emission of elementary dislocations, is found to be facilitated by curvature walls connecting interacting disclinations. At intermediate times in the coarsening process, split-core dislocation formation and interactions displaying an effective disclination quadrupole configuration are observed. This work provides the framework for further understanding of the formation and dynamics of the diverse set of curvature defects observed in smectic liquid crystals and other layered material systems.
dc.identifierhttps://arxiv.org/abs/0805.3651
dc.identifierhttp://arxiv.org/abs/0805.3651
dc.identifierNasser Mohieddin Abukhdeir et al 2008 New J. Phys. 10 063025 (17pp)
dc.identifierdoi:10.1088/1367-2630/10/6/063025
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/163749
dc.subjectSoft Condensed Matter
dc.subjectChemical Physics
dc.titleDefect kinetics and dynamics of pattern coarsening in a two-dimensional smectic-A system
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