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Thin nematic films: Anchoring effects and stripe instability revisited
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
2013 (English)In: Physics Letters A, ISSN 0375-9601, E-ISSN 1873-2429, Vol. 377, no 13, 1003-1011 p.Article in journal (Refereed) Published
Abstract [en]

We study theoretically the formation of long-wavelength instability patterns observed at spreading of nematic droplets on liquid substrates. The role of surface-like elastic terms in nematic films of submicron thickness is (re)examined by extending our previous work to hybrid aligned nematics. We identify the upper threshold for the formation of stripes and compare our results with experimental observations. We find that the wavelength and the amplitude of the in-plane director undulations can be related to the small but finite azimuthal anchoring. Within a simplified model we analyse the possibility of non-planar base state below the Barbero-Barberi critical thickness.

Place, publisher, year, edition, pages
2013. Vol. 377, no 13, 1003-1011 p.
Keyword [en]
Surface-induced ordering of liquid crystals, Continuum models, Symmetry breaking transitions, Anchoring phenomena, Saddle-splay elasticity
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-89574DOI: 10.1016/j.physleta.2013.01.047ISI: 000316426200013OAI: oai:DiVA.org:su-89574DiVA: diva2:618617
Note

AuthorCount:2;

Available from: 2013-04-29 Created: 2013-04-29 Last updated: 2017-12-06Bibliographically approved

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