A new configurational transition in inhomogeneous nematics
作者:
P. Palffy-muhoray,
E.C. Gartland,
J.R. Kelly,
期刊:
Liquid Crystals
(Taylor Available online 1994)
卷期:
Volume 16,
issue 4
页码: 713-718
ISSN:0267-8292
年代: 1994
DOI:10.1080/02678299408036543
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
At the wall in a hybrid cell with strong anchoring, the nematic director is parallel to one wall and perpendicular to the other. Usually, the free energy is minimized by a configuration where the director orientation changes continuously with position across the cell. The boundary conditions can also be satisfied, however, by a biaxial configuration without such rotation. Under certain conditions, such as under increased curvature strains, a transition can take place between these configurations. The transition typically occurs when the wavelength of the deformation becomes comparable to the coherence length of the material. The hybrid cell considered is a simple illustrative example; in real systems, such a transition may be expected in highly strained thermotropics, or in strained lyotropics which are easily made biaxial.
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