Defects dynamics in roll structures of twisted nematics

V. Delev, E. Batyrshin, O. Scaldin, Y. Lebedev, Y. Timirov
Received: 10 March 2015; Revised: 05 May 2015; Accepted: 10 June 2015
Citation: V. Delev, E. Batyrshin, O. Scaldin, Y. Lebedev, Y. Timirov. Defects dynamics in roll structures of twisted nematics. Letters on Materials, 2015, 5(4) 376-379
BibTex   DOI: 10.22226/2410-3535-2015-4-376-379

Abstract

Dynamics of singular and nonsingular defects in the periodic structures of rolls arising at electroconvection in nematic liquid crystals twisted by π/2 has been studied. The emergence of non-singular defects is associated with an axial component of the velocity of the hydrodynamic flows whose direction is opposite in the neighboring rolls. At some voltage U>Uc both these struc-tural defects starts to oscillate. It is shown that the average frequency of the "zig-zag" oscillation decreases with increasing size of the defects.

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