Propagating electrohydrodynamic instabilities in nematics

Raghunathan, V. A. ; Murthy, P. R. Maheswara ; Madhusudana, N. V. (1991) Propagating electrohydrodynamic instabilities in nematics Molecular Crystals and Liquid Crystals, 199 . pp. 239-248. ISSN 1058-725X

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We show that a propagating electrohydrodynamic instability occurs in a nematic liquid crystal at the threshold of DC excitation if the symmetry of a planar aligned cell is changed by introducing a small pretilt of the director. Flexoelectric torques, which are π/2 out of phase with those produced by other couplings, provide the driving mechanism for the propagating mode, whose direction depends on that of the applied field. Some experimental observations on this mode are also presented.

Item Type:Article
Source:Copyright of this article belongs to Taylor and Francis Ltd.
Keywords:Electrohydrodynamic Instabilities; Nematics
ID Code:20904
Deposited On:20 Nov 2010 13:22
Last Modified:17 May 2016 05:09

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