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	Defects Around a Spherical Particle in Cholesteric Liquid Crystals
	Tong, Yu ; Wang, Yiwei ; Zhang, Pingwen
	2017
关键词	Cholesteric liquid crystal defects Landau-de Gennes theory spectral method DE-GENNES THEORY TOPOLOGICAL DEFECTS NEMATIC EMULSIONS LANDAU THEORY BLUE PHASES
英文摘要	We investigate the defect structures around a spherical colloidal particle in a cholesteric liquid crystal using spectral method, which is specially devised to cope with the inhomogeneity of the cholesteric at infinity. We pay particular attention to the cholesteric counterparts of nematic metastable configurations. When the spherical colloidal particle imposes strong homeotropic anchoring on its surface, besides the well-known twisted Saturn ring, we find another metastable defect configuration, which corresponds to the dipole in a nematic, without outside confinement. This configuration is energetically preferable to the twisted Saturn ring when the particle size is large compared to the nematic coherence length and small compared to the cholesteric pitch. When the colloidal particle imposes strong planar anchoring, we find the cholesteric twist can result in a split of the defect core on the particle surface similar to that found in a nematic liquid crystal by lowering temperature or increasing particle size.; National Natural Science Foundation of China [11421101, 11421110001]; SCI(E); 中国科学引文数据库(CSCD); ARTICLE; 2; 205-221; 10
语种	英语
出处	CSCD ; SCI
出版者	NUMERICAL MATHEMATICS-THEORY METHODS AND APPLICATIONS
内容类型	其他
源URL	[http://hdl.handle.net/20.500.11897/473711]
专题	数学科学学院
推荐引用方式 GB/T 7714	Tong, Yu,Wang, Yiwei,Zhang, Pingwen. Defects Around a Spherical Particle in Cholesteric Liquid Crystals. 2017-01-01.

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