Inhibited pattern formation by asymmetrical high-voltage excitation in nematic fluids

Péter Salamon, Nándor Éber, Balázs Fekete, Ágnes Buka

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Abstract

In contrast to the predictions of the standard theory of electroconvection (EC), our experiments showed that the action of superposed ac and dc voltages rather inhibits pattern formation than favors the emergence of instabilities; the patternless region may extend to much higher voltages than the individual ac or dc thresholds. The pattern formation induced by such asymmetrical voltage was explored in a nematic liquid crystal in a wide frequency range. The findings could be qualitatively explained for the conductive EC, but represent a challenging problem for the dielectric EC.

Original languageEnglish
Article number022505
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume90
Issue number2
DOIs
Publication statusPublished - Aug 27 2014

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ASJC Scopus subject areas

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

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