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Surface-induced ordering of nematics in an external field: The strong influence of tilted walls

TitleSurface-induced ordering of nematics in an external field: The strong influence of tilted walls
Publication TypeJournal Article
Year of Publication2004
AuthorsSokolovska, TG, Sokolovskii, RO, Patey, GN
JournalPhysical Review Letters
Volume92
Pagination4
Date PublishedMay
Type of ArticleArticle
ISBN Number0031-9007
KeywordsCONTACT, FLUID, LIQUID-CRYSTALS, ORNSTEIN-ZERNIKE EQUATION, PHASE, SUBSTRATE, TRANSITIONS
Abstract

Microscopic theory is used to investigate surface-induced order in a model nematic subjected to an external orienting field. The wall-particle interaction tends to orient particles perpendicular to the surface. It is shown that if the wall is tilted at similar to45degrees to the field, the reorientational effects can be an order of magnitude larger than those observed for perpendicular or parallel orientations. The surprising observation is associated with the breaking of a particular bulk symmetry. A possible practical application of the tilted geometry is briefly discussed.

URL<Go to ISI>://000221277900033