Electroconvection in nematic liquid crystals: comparison between experimental results and the hydrodynamic model

被引：42

作者：

Brand, HR ^{[1
]}

Fradin, C ^{[1
]}

Finn, PL ^{[1
]}

Pesch, W ^{[1
]}

Cladis, PE ^{[1
]}

机构：

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

来源：

PHYSICS LETTERS A | 1997年 / 235卷 / 05期

关键词：

D O I：

10.1016/S0375-9601(97)00680-4

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We describe experimental observations illustrating the extraordinary sensitivity of pattern formation in electroconvection in nematic liquid crystals to changes in magnitude and sign of dynamic transport coefficients triggered by weak fluctuations from a lower temperature nematic-smectic A phase transition. These results are compared to predictions of a hydrodynamic model (HM). We find two patterns at onset not predicted by HM: a rectangular pattern of short normal rolls, and, at lower temperatures, localized patterns coexisting with the subcritical state. (C) 1997 Elsevier Science B.V.

引用

页码：508 / 514

页数：7

共 32 条

[1] ON ELECTRICALLY DRIVEN PATTERN-FORMING INSTABILITIES IN PLANAR NEMATICS [J].