Surprising Dynamics of Some Cholesteric Liquid Crystal Patterns
- 29 June 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 80 (26), 5742-5745
- https://doi.org/10.1103/PhysRevLett.80.5742
Abstract
Under homeotropic anchoring conditions, the first order nematic-cholesteric phase transition gives rise to localized spatial patterns called cholesteric fingers. In this Letter we describe a new equilibrium structure which, to our knowledge, has never been reported either numerically or analytically, and we investigate its dynamics. This chiral pattern, which has broken the parity symmetry, is found to move when submitted to an ac electric voltage or to a white noise. Our result may explain, at least qualitatively, the recent observations of spontaneous spiral wave formations in cholesteric liquid crystal under the application of an ac electric voltage.Keywords
This publication has 20 references indexed in Scilit:
- Is the Electromechanical Coupling the Driving Force for the Perpendicular Drift of First Class Cholesteric Finger?Journal de Physique II, 1997
- Crawling and spiraling of cholesteric fingers in electric fieldJournal de Physique II, 1994
- Two-dimensional Landau–de Gennes dynamical model for the unwinding transition of a cholesteric liquid crystalPhysical Review E, 1993
- Smectic A–cholesteric transition in a side chain cooligomer–CE1 blend. A particular confined geometry for the TGB phase?Liquid Crystals, 1992
- Field-induced spirals from a confined cholestericJournal de Physique II, 1992
- First observations of a spiral instability at the smectic A—cholesteric transition under an electric fieldLiquid Crystals, 1992
- Electric-field-induced phase transitions in frustrated cholesteric liquid crystals of negative dielectric anisotropyPhysical Review A, 1991
- Influence of anisotropic elasticity on pattern formation in a cholesteric liquid crystal contained between two platesPhysical Review A, 1989
- A Novel Polar Electro-Optic Effect in Thin Large-Pitch Cholesteric FilmsMolecular Crystals and Liquid Crystals, 1984
- Chemical Oscillations, Waves, and TurbulencePublished by Springer Nature ,1984