Defect Core Structures in Twisted Nematic and Twisted Chiral Liquid Crystals

• 作者: Guili Zheng Xuan Zhou Zhidong Zhang
• 来源期刊: 现代物理(英文)
• 学科: 物理学
• 关键词: DISCLINATIONS EIGENVALUE Exchange DEFECT Core Landau-de Gennes Theory
• 年，卷（期）: 2013,（2）
• 页码范围: 272-279
• 页数: 8页
• 分类号: O7

摘要

The defect structures of s = ±1/2 twist disclinations in twisted nematic and twisted chiral liquid crystals have been investigated within the Landau-de Gennes theory numerically. Our results show that there exists eigenvalue exchange across the defect core of both the two models. The defect core is essentially biaxial and never isotropic. The defect centre is uniaxial and is surrounded by a strong biaxial region.