Electroconvection in homeotropic nematic liquid crystals

Nándor Éber, Ágnes Buka
2005 Phase Transitions  
Electroconvection is a classical example of pattern-forming phenomena in liquid crystals, typically observed in nematics with negative dielectric and positive conductivity anisotropies. This article focuses on how electroconvection in the homeotropic geometry differs from that in planar alignment. The influence of an additional magnetic field on the pattern characteristics and on secondary instabilities (the normal roll-abnormal roll transition) is discussed. The homeotropic alignment offers
more » ... alignment offers unique possibilities also for studying defect motion. Basic characteristics of some patterns of large wavelength are presented and compared with those of the classical Carr-Helfrich structures. Finally, electroconvection in substances with negative conductivity anisotropy is addressed.
doi:10.1080/01411590500185278 fatcat:rhzupeblwvbdzhghxgcmuq7fle