Transition from longitudinal to transversal patterns in an anisotropic system

Martin May, Wolfgang Schöpf, Ingo Rehberg, Alexei Krekhov, A. Buka

Research output: Contribution to journalArticle

21 Citations (Scopus)

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 0.1 Hz. 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.

Original languageEnglish
Article number046215
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume78
Issue number4
DOIs
Publication statusPublished - Oct 24 2008

Fingerprint

Crossover
Low Frequency
crossovers
Voltage
extremely low frequencies
low conductivity
very low frequencies
electric potential
Nematic Liquid Crystal
Oblique
Conductivity
Convection
Electric Field
convection
liquid crystals
Scenarios
electric fields
Model

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Statistical and Nonlinear Physics
  • Statistics and Probability

Cite this

Transition from longitudinal to transversal patterns in an anisotropic system. / May, Martin; Schöpf, Wolfgang; Rehberg, Ingo; Krekhov, Alexei; Buka, A.

In: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Vol. 78, No. 4, 046215, 24.10.2008.

Research output: Contribution to journalArticle

@article{840b6255e08141dca33b2a8029add8a4,
title = "Transition from longitudinal to transversal patterns in an anisotropic system",
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 0.1 Hz. 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.",
author = "Martin May and Wolfgang Sch{\"o}pf and Ingo Rehberg and Alexei Krekhov and A. Buka",
year = "2008",
month = "10",
day = "24",
doi = "10.1103/PhysRevE.78.046215",
language = "English",
volume = "78",
journal = "Physical review. E",
issn = "2470-0045",
publisher = "American Physical Society",
number = "4",

}

TY - JOUR

T1 - Transition from longitudinal to transversal patterns in an anisotropic system

AU - May, Martin

AU - Schöpf, Wolfgang

AU - Rehberg, Ingo

AU - Krekhov, Alexei

AU - Buka, A.

PY - 2008/10/24

Y1 - 2008/10/24

N2 - 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 0.1 Hz. 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.

AB - 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 0.1 Hz. 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.

UR - http://www.scopus.com/inward/record.url?scp=55849092051&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=55849092051&partnerID=8YFLogxK

U2 - 10.1103/PhysRevE.78.046215

DO - 10.1103/PhysRevE.78.046215

M3 - Article

AN - SCOPUS:55849092051

VL - 78

JO - Physical review. E

JF - Physical review. E

SN - 2470-0045

IS - 4

M1 - 046215

ER -