Pattern formation of chevrons in the conduction regime in homeotropically aligned liquid crystals

Jong Hoon Huh, Yoshiki Hidaka, Axel G. Rossberg, Shoichi Kai

Research output: Contribution to journalArticle

59 Citations (Scopus)

Abstract

We report on chevrons (herringbonelike patterns) observed in homeotropically aligned liquid crystals with high electric conductivity. We focus our attention on two types of chevrons observed in the conduction regime. The threshold voltage and the characteristic double periodicity of chevrons (i.e., the short wavelength [Formula Presented] of the striated rolls and the long wavelength [Formula Presented] of the chevron bands) have been measured as functions of the applied electric frequency f. With the aid of a crossed polarizer set, we have, in addition, determined the director field which shows a periodic in-plane rotation for our chevrons (with a wavelength [Formula Presented] We arrived at the types of chevrons after qualitatively different bifurcation sequences with increasing voltage. The frequency dependence of [Formula Presented] also shows a qualitatively different behavior with respect to the two types of chevrons. The experimental results are discussed in terms of recent theoretical investigations.

Original languageEnglish
Pages (from-to)2769-2776
Number of pages8
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Volume61
Issue number3
DOIs
Publication statusPublished - Jan 1 2000

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Mathematical Physics
  • Condensed Matter Physics
  • Physics and Astronomy(all)

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