Observing Correlated Production of Defects-Antidefects in Liquid Crystals
Abstract
We present observations of strength one defects and antidefects formed in isotropic-nematic phase transition in a thin layer of nematic liquid crystals, using a cross-polarizer setup. We measure the widths of the distributions of {\it net} winding number in small regions, and determine the exponent characterizing the correlation between defects and antidefects to be 0.260.11, in very good agreement with the value 1/4 predicted by the Kibble mechanism for defect production. We also describe a novel technique to determine the director distribution in observations of defect networks.
Keywords
Cite
@article{arxiv.hep-ph/9805502,
title = {Observing Correlated Production of Defects-Antidefects in Liquid Crystals},
author = {Sanatan Digal and Rajarshi Ray and Ajit M. Srivastava},
journal= {arXiv preprint arXiv:hep-ph/9805502},
year = {2009}
}
Comments
RevTex file, 7 pages + 4 figures, significantly revised version involving new data and new analysis. Exponent characterizing defect-antidefect correlations determined