Splay Stripes in Hybrid Aligned Nematics with Bulk Elastic Isotropy: The Role ofK24
- 1 October 1992
- journal article
- research article
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 221 (1) , 109-119
- https://doi.org/10.1080/10587259208037526
Abstract
In hybrid aligned nematic layers a periodic deformation of splay-type may occur at convenient cell thicknesses, if the energetic cost for a mixed twist-splay distortion is less than the cost of a pure splay. In the case of bulk elastic isotropy, we have found that the periodic instability is forbidden, unless the torsional anchoring at the homeotropic substrate is considerably weak. Moreover, the surface-like elastic constant K 24 is shown deeply to influence the occurrence of the periodic pattern.Keywords
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