Colloquium: Disclination loops, point defects, and all that in nematic liquid crystals
Colloquium: Disclination loops, point defects, and all that in nematic liquid crystals
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DOI：
10.1103/revmodphys.84.497
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发表时间：
2012-04-09
影响因子：
44.1
通讯作者：
Kamien, Randall D.
中科院分区：
文献类型：
--
作者：
Alexander, Gareth P.;Chen, Bryan Gin-Ge;Kamien, Randall D.
拓扑缺陷的同伦理论是在广泛的物理系统中组织和统一许多思想的有力工具。近年来，在控制和测量液晶相中的胶体包裹体方面取得了实验进展。这些系统的拓扑结构相当丰富，但同时也很微妙。受实验和拓扑推理能力的启发，对单轴向列相液晶中缺陷的分类进行了综述和阐述。人们特别注意到了这些系统中出现的模棱两可的问题，这些系统在广为人知的XY模型或海森堡铁磁体中没有对应的东西。
The homotopy theory of topological defects is a powerful tool for organizing and unifying many ideas across a broad range of physical systems. Recently, experimental progress was made in controlling and measuring colloidal inclusions in liquid crystalline phases. The topological structure of these systems is quite rich but, at the same time, subtle. Motivated by experiment and the power of topological reasoning, the classification of defects in uniaxial nematic liquid crystals was reviewed and expounded upon. Particular attention was paid to the ambiguities that arise in these systems, which have no counterpart in the much-storied XY model or the Heisenberg ferromagnet.