Layering transitions and metastable structures of cholesteric liquid crystals in cylindrical confinement.
basic_science · Level V
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- Record sourced from PubMed, PMID 34373332.
- Also identified by DOI 10.1073/pnas.2102926118 and PMC identifier 8379955.
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Abstract
Our study of cholesteric lyotropic chromonic liquid crystals in cylindrical confinement reveals the topological aspects of cholesteric liquid crystals. The double-twist configurations we observe exhibit discontinuous layering transitions, domain formation, metastability, and chiral point defects as the concentration of chiral dopant is varied. We demonstrate that these distinct layer states can be distinguished by chiral topological invariants. We show that changes in the layer structure give rise to a chiral soliton similar to a toron, comprising a metastable pair of chiral point defects. Through the applicability of the invariants we describe to general systems, our work has broad relevance to the study of chiral materials.