SPLAY STRIPES IN HYBRID ALIGNED NEMATICS WITH BULK ELASTIC ISOTROPY - THE ROLE OF K24

被引：19

作者：

SPARAVIGNA, A ^{[1
]}

STRIGAZZI, A ^{[1
]}

机构：

[1] INFM, UNITA TORINA, I-10129 TURIN, ITALY

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1992年 / 221卷

关键词：

D O I：

10.1080/10587259208037526

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In hybrid aligned nematic layers a periodic deformation of splay-type may occur at convenient cell thicknesses, if the energetic cost for a mixed twist-splay distortion is less than the cost of a pure splay. In the case of bulk elastic isotropy, we have found that the periodic instability is forbidden, unless the torsional anchoring at the homeotropic substrate is considerably weak. Moreover, the surface-like elastic constant K24 is shown deeply to influence the occurrence of the periodic pattern.

引用

页码：109 / 119

页数：11

共 14 条

[1] CRITICAL THICKNESS OF A HYBRID ALIGNED NEMATIC LIQUID-CRYSTAL CELL [J].

BARBERO, G ;

BARBERI, R .

JOURNAL DE PHYSIQUE, 1983, 44 (05) :609-616

[2] THE STRUCTURE OF THE DISTORTION FREE-ENERGY DENSITY IN NEMATICS - 2ND-ORDER ELASTICITY AND SURFACE TERMS [J].

BARBERO, G ;

SPARAVIGNA, A ;

STRIGAZZI, A .

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS, 1990, 12 (09) :1259-1272

[3] ON THE VALIDITY OF THE RAPINI-PAPOULAR SURFACE ANCHORING ENERGY FORM IN NEMATIC LIQUID-CRYSTALS [J].