학술논문
Electrical impedance analysis on the threshold voltage of a pattern formation in liquid crystals / 電気インピーダンス測定による液晶パターン形成における閾値電圧の解析
Document Type
Journal Article
Author
Source
Proceedings of Japanese Liquid Crystal Society Annual meeting. 2021, :3
Subject
Language
Japanese
ISSN
1880-3490
2432-5988
2432-5988
Abstract
Homeotropically aligned nematic liquid crystals (NLCs) with negative dielectric anisotropy show umbilical defect structures under an electric field. The position of defects can be stabilized when NLCs are doped with ions. In order to understand the role of doped ions, here, we perform complex impedance measurements on sample cells which exhibit the pattern formation of umbilical defects. Low frequency measurements reveal that the pattern formation is a unique orientational response occurring on a charged dielectric surface.