Volume 52, Number 5, December I 2000
|Page(s)||525 - 531|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||01 September 2002|
Electrically driven hybrid instabilities in smectic C liquid crystal films
Max-Planck-Institute for Polymer Research - D-55021 Mainz,
2 Theoretische Physik, University of the Saarland - D-66041 Saarbrücken, Germany
Accepted: 25 September 2000
Novel static hybrid instabilities in smectic C liquid (SmC) crystal films are described. The Frederiks transition, well known for nematic liquid crystals, also takes place in smectic C layers, but here it is spatially periodic and coupled to undulations of the smectic layer. The Helfrich-Hurault undulational instability, typical for smectic A liquid crystals, occurs in SmC liquid crystals too, but the wave vector of the undulation of the layers is oblique to the applied external field. In addition, this modified Helfrich-Hurault instability not only involves layer undulations, but also contains deformations of the director field, which are typical for the Frederiks transition. The coupled deformations depend on all three coordinate axes, thus characterizing 3-dimensional patterns. There are parameter ranges, where both types of static instabilities, which differ by the spatial wave number, compete with each other near codimension-2 bifurcations.
PACS: 47.20.-k – Hydrodynamic stability / 61.30.-v – Liquid crystals
© EDP Sciences, 2000
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.