Surface anchoring as a control parameter for stabilizing torons, skyrmions, twisted walls, fingers and their hybrids in chiral nematics

Chiral condensed matter systems, such as liquid crystals and magnets, exhibit a host of spatially localized topological structures that emerge from the medium's tendency to twist and its competition with confinement and field coupling effects. We show that the strength of perpendicular surface...

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Bibliographic Details
Published in:arXiv.org 2020-05
Main Authors: Tai, Jung-Shen B, Smalyukh, Ivan I
Format: Article
Language:English
Subjects:
Anchoring
Boundary conditions
Condensed matter physics
Crystal structure
Dimensional stability
Hypothetical particles
Liquid crystals
Magnets
Particle theory
Solitary waves
Structural stability
Three dimensional models
Topology
Walls
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Summary:Chiral condensed matter systems, such as liquid crystals and magnets, exhibit a host of spatially localized topological structures that emerge from the medium's tendency to twist and its competition with confinement and field coupling effects. We show that the strength of perpendicular surface boundary conditions can be used to control the structure and topology of solitonic and other localized field configurations. By combining numerical modeling and three-dimensional imaging of the director field, we reveal structural stability diagrams and inter-transformation of twisted walls and fingers, torons and skyrmions and their crystalline organizations upon changing boundary conditions. Our findings provide a recipe for controllably realizing skyrmions, torons and hybrid solitonic structures possessing features of both of them, which will aid in fundamental explorations and technological uses of such topological solitons. Moreover, we discuss how other material parameters can be used to determine soliton stability, and how similar principles can be systematically applied to other liquid crystal solitons, and solitons in other material systems.
ISSN:2331-8422
DOI:10.48550/arxiv.1911.07829