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DOI 10.21662
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Delev V.A. Dynamics of dislocations in the domain structure of the nematic liquid crystal. Multiphase Systems. 15 (2020) 3–4. 201–207 (in Russian).
2020. Vol. 15. Issue 3–4, Pp. 201–207
URL: http://mfs.uimech.org/mfs2020.3.130
DOI: 10.21662/mfs2020.3.130
Dynamics of dislocations in the domain structure of the nematic liquid crystal
Delev V.A.
Institute of Molecule and Crystal Physics UFRC RAS, Ufa

Abstract

Dynamics and interaction of classical dislocations in the domain structure of π/2 nematic liquid crystal is studied. A feature of twisted nematics is that hydrodynamic flows in Williams domains, together with the tangential component of velocity, also have an axial component, the direction of which is opposite in neighboring domains. Dislocations can move both perpendicular (glide) to Williams domains, and along (climb) them. It was found that when dislocations collide with opposite topological charges S = ±1 at given voltage, their speed increases. It has been shown that dynamics and interaction of dislocations with topological charges S = ±1 are qualitatively well described by the perturbed sine-Gordon equation.

Keywords

nematic liquid crystal,
domain structure,
dislocation,
kink,
sine-Gordon equation

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