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Transition from longitudinal to transversal patterns in an anisotropic system

DOI zum Zitieren dieses Dokuments: https://doi.org/10.1103/PhysRevE.78.046215
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: https://doi.org/10.1103/PhysRevE.78.046215

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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 > Chair Experimental Physics V > 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
Language: English
Originates at UBT: Yes
URN: urn:nbn:de:bvb:703-epub-3970-9
Date Deposited: 24 Jan 2019 12:01
Last Modified: 24 Jan 2019 12:01
URI: https://epub.uni-bayreuth.de/id/eprint/3970

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