Flexoelectricity in Electroconvection

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We reexamine the influence of the flexoelectricity on the electroconvection (EC), the effect which has previously been studied in the conductive EC regime only. Now we extend our studies to the dielectric EC, and to the parameter range for which the standard model of EC excludes the existence of the instability. First, we demonstrate that inclusion of flexoelectricity into the standard model of EC provides a finite EC threshold even for this forbidden material parameter range (in accordance with the experiments). Second, we show that flexoelectricity considerably decreases the threshold voltage for the dielectric regime. Finally, we present a novel frequency dependence of the threshold voltage for all EC patterns in the case when the period of the driving frequency becomes comparable with the director relaxation time.

Original languageEnglish
Pages (from-to)111481-241494
Number of pages130014
JournalMolecular Crystals and Liquid Crystals
Volume511
DOIs
Publication statusPublished - Sep 2009

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Threshold voltage
threshold voltage
Relaxation time
relaxation time
inclusions
thresholds
Experiments

Keywords

  • Electroconvection
  • Flexoelectricity
  • Pattern formation

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Science(all)

Cite this

Flexoelectricity in Electroconvection. / Tóth-Katona, T.; Éber, N.; Buka, A.

In: Molecular Crystals and Liquid Crystals, Vol. 511, 09.2009, p. 111481-241494.

Research output: Contribution to journalArticle

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