Phase ordering in bulk uniaxial nematic liquid crystals
نویسندگان
چکیده
منابع مشابه
Uniaxial symmetry in nematic liquid crystals
Within the Landau-de Gennes theory of liquid crystals, we study theoretically the equilibrium configurations with uniaxial symmetry. We show that the uniaxial symmetry constraint is very restrictive and can in general not be satisfied, except in very symmetric situations. For oneand two-dimensional configurations, we characterize completely the uniaxial equilibria: they must have constant direc...
متن کاملElastic Constants of Nematic Liquid Crystals of Uniaxial Symmetry
We study in detail the influence of molecular interactions on the Frank elastic constants of uniaxial nematic liquid crystals composed of molecules of cylindrical symmetry. A brief summary of the status of theoretical development for the elastic constants of nematics is presented. Considering a pair potential having both repulsive and attractive parts numerical calculations are reported for thr...
متن کاملOrdering of Glass Rods in Nematic and Cholesteric Liquid Crystals
The orientational assembly of glass rods (3 x ~15 μm) in nematic, twisted nematic, and cholesteric liquid crystal cells was observed and quantified with optical microscopy. At this size, the rods were affected strongly by gravity and sedimented to the bottom of the cells. Temporal visualization of the sedimentation process (induced by flipping the cell over) shed insight into the effect the liq...
متن کاملPretransitional Nematic Ordering in Liquid Crystals with Dispersed Polymer Networks
The birefringence induced by partially ordered polymer networks dispersed in an isotropic phase of liquid crystals is studied. Polymer networks were formed by the polymerization of 1–4 % mixtures of prepolymer in the nematic phase of liquid crystals. The partial nematic ͑paranematic͒ ordering is analyzed in terms of the Landau–de Gennes approach using a simple model of an array of thin fibrils, w...
متن کاملBulk and surface biaxiality in nematic liquid crystals.
Nematic liquid crystals possess three different phases: isotropic, uniaxial, and biaxial. The ground state of most nematics is either isotropic or uniaxial, depending on the external temperature. Nevertheless, biaxial domains have been frequently identified, especially close to defects or external surfaces. In this paper we show that any spatially varying director pattern may be a source of bia...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review E
سال: 1997
ISSN: 1063-651X,1095-3787
DOI: 10.1103/physreve.56.6843