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Transition from longitudinal to transversal patterns in an anisotropic system

URN to cite this document: urn:nbn:de:bvb:703-epub-3970-9

Title data

May, Martin ; Schöpf, Wolfgang ; Rehberg, Ingo ; Krekhov, Alexei ; Buka, Agnes:
Transition from longitudinal to transversal patterns in an anisotropic system.
In: Physical Review E. Vol. 78 (October 2008) Issue 4 . - Eintrag 046215.
ISSN 1550-2376
DOI der Verlagsversion: https://doi.org/10.1103/PhysRevE.78.046215

Format:	PDF
Name:	PhysRevE.78.046215.pdf
Version:	Published Version
Available under License	German copyright law. This contribution is freely accessible with the consent of the copyright holder on the basis of an (DFG-funded) alliance or national license. The document may be used free of charge for personal use. In addition, the reproduction, editing, distribution and any kind of exploitation require the written consent of the respective rights holder.

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Abstract

Periodic stripe patterns which form when an electric field is applied to a thin nematic liquid crystal layer with a very low conductivity are discussed. In this case the dielectric electroconvection mode persists down to very low frequencies of the driving voltage. A Lifschitz point, i.e., a transition from normal to oblique rolls is detected in the dielectric regime. A crossover from electroconvection to flexoelectric domains occurs for extremely low frequencies of about 0.1Hz. The crossover scenario yields pattern morphologies characteristic for both mechanisms, i.e., electroconvection and flexoelectric domains which appear consecutively within one period of the driving voltage. A theoretical description of the onset characteristics of dielectric convection, which is based on an extended model including flexoelectricity, is also presented.

Further data

Item Type:	Article in a journal
Keywords:	Pattern selection, pattern formation; Liquid crystals; Magnetohydrodynamics and electrohydrodynamics.
DDC Subjects:	500 Science > 530 Physics
Institutions of the University:	Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Former Professors > Chair Experimental Physics V - Univ.-Prof. Dr. Ingo Rehberg Profile Fields > Advanced Fields > Nonlinear Dynamics Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V Profile Fields Profile Fields > Advanced Fields Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Former Professors
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-3970-9
Date Deposited:	24 Jan 2019 12:01
Last Modified:	03 Jul 2020 10:42
URI:	https://epub.uni-bayreuth.de/id/eprint/3970

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