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  • Title: Electroconvection in nematic liquid crystals with positive dielectric and negative conductivity anisotropy.
    Author: Buka A, Dressel B, Otowski W, Camara K, Toth-Katona T, Kramer L, Lindau J, Pelzl G, Pesch W.
    Journal: Phys Rev E Stat Nonlin Soft Matter Phys; 2002 Nov; 66(5 Pt 1):051713. PubMed ID: 12513509.
    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.
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