Defect transitions in nematic liquid-crystal capillary bridges

Perry W. Ellis, Shengnan Huang, Susannah Klaneček, Jayalakshmi Vallamkondu, Edward Dannemiller, Mark Vernon, Ya Wen Chang, Paul M. Goldbart, Alberto Fernandez-Nieves

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We use experiment and computational modeling to understand the defect structure and director configuration in a nematic liquid crystal capillary bridge confined between two parallel plates. We find that tuning of the aspect ratio of the bridge drives a transition between a ring defect and a point defect. This transition exhibits hysteresis, due to the metastability of the point-defect structure. In addition, we see that the shape of the capillary-bridge surface determines whether the defect is hyperbolic or radial, with waistlike bridges containing hyperbolic defects and barrel-like bridges containing radial defects.

Original languageEnglish
Article number040701
JournalPhysical Review E
Volume97
Issue number4
DOIs
StatePublished - Apr 13 2018

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