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Issue 20, 2020
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Transition from escaped to decomposed nematic defects, and vice versa

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Abstract

An escaped radial director profile in a nematic liquid crystal cell can be transformed into a pair of strength m = +1/2 surface defects (and their associated disclination lines) at a threshold electric field. Analogously, a half-integer defect pair can be transformed at a threshold electric field into a director profile that escapes into the third dimension. These transitions were demonstrated experimentally and numerically, and are discussed in terms of topologically discontinuous and continuous pathways that connect the two states. Additionally, we note that the pair of disclination lines associated with the m = +1/2 surface defects were observed to co-rotate around a common point for a sufficiently large electric field at a sufficiently low frequency.

Graphical abstract: Transition from escaped to decomposed nematic defects, and vice versa

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Supplementary files

Article information


Submitted
06 Feb 2020
Accepted
03 May 2020
First published
15 May 2020

Soft Matter, 2020,16, 4814-4822
Article type
Paper

Transition from escaped to decomposed nematic defects, and vice versa

A. L. Susser, S. Harkai, S. Kralj and C. Rosenblatt, Soft Matter, 2020, 16, 4814
DOI: 10.1039/D0SM00218F

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