NONEQUILIBRIUM PHASE WINDING AND ITS BREAKDOWN AT A CHIRAL INTERFACE

被引：8

作者：

BRAND, HR ^{[1
]}

CLADIS, PE ^{[1
]}

机构：

[1] AT&T BELL LABS,MURRAY HILL,NJ 07974

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.72.104

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We describe a nonequilibrium phase winding of the liquid-crystal director at a flat cholesteric-isotropic interface. The physical origin of the driving force is a symmetry-allowed coupling between an equilibrium helix structure and gradients in impurity concentration set up at an interface forced to move by displacing the sample in a temperature gradient. We interpret these observations to evaluate the coupling constant: \nu(c)\ = 3 x 10(-4) dyn/cm. A second transition is observed at higher displacement speeds to an orientationally disordered state.

引用

页码：104 / 107

页数：4

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