منابع مشابه
Critical Splay-Bend Deformation of Nematic Films
I n t h i n nemat ic f i lms the d i rec tor field n may on ly depend on z, the n o r m a l to the film p lane. There are two stable conf igurat ions w i t h less than a l l three types of de fo rma t ion present, the pure tw is t and the pure splay-bend. Fo r the pure tw is t under the add i t i ona l in f luence of an ex te rna l field n o r m a l to the tw is t p lane the range of s tab i l ...
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We measured the splay (K11) and bend (K33) elastic constants in the nematic phase of a bent-core liquid crystal. In the vicinity of the nematic-isotropic transition temperature K33 is proportional to the square of the order parameter. In the nematic range K11 increases monotonically with decreasing temperature, whereas K33 is practically independent of temperature and is smaller than K11 . K33 ...
متن کاملField-induced transient periodic structures in nematic liquid crystals : the splay Frederiks transition
2014 A beautiful striped texture is often observed as the initial response of a uniformly aligned nematic liquid crystal to a suddenly applied reorienting field The structure of the instability depends on the elastic and viscous anisotropy of the liquid crystal, the field strength, and in an important way on the boundary conditions imposed by the sample cell. We have studied the geometry in whi...
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ژورنال
عنوان ژورنال: Physical Review X
سال: 2018
ISSN: 2160-3308
DOI: 10.1103/physrevx.8.041025