Electroconvection in nematic liquid crystals with positive dielectric and negative conductivity anisotropy

Buka, B. Dressel, W. Otowski, K. Camara, T. Toth-Katona, L. Kramer, J. Lindau, G. Pelzl, W. Pesch

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Electroconvection in an unusual nematic compound with strongly positive dielectric anisotropy and negative anisotropy of the conductivity is investigated. For homeotropic alignment, where one has a direct transition to rolls or squares depending on the frequency of the applied voltage, we present a quantitative theory. From the comparison we infer values for some viscosities, which are rather unusual, but not unreasonable in view of the vicinity of the nematic-smectic transition. For planar alignment, electroconvection sets in above a splay Freedericksz transition with “parallel rolls,” which is also captured by the theory.

Original languageEnglish
Number of pages1
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Volume66
Issue number5
DOIs
Publication statusPublished - Nov 26 2002

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Electroconvection in nematic liquid crystals with positive dielectric and negative conductivity anisotropy'. Together they form a unique fingerprint.

  • Cite this