CRITICAL-BEHAVIOR AT NEMATIC SMECTIC-A PHASE-TRANSITIONS

被引：144

作者：

GARLAND, CW ^{[1
]}

NOUNESIS, G ^{[1
]}

机构：

[1] MIT,DEPT CHEM,CAMBRIDGE,MA 02139

来源：

PHYSICAL REVIEW E | 1994年 / 49卷 / 04期

关键词：

D O I：

10.1103/PhysRevE.49.2964

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The effective experimental critical exponents alpha, gamma, nu(parallel-to), and nu(perpendicular-to) obtained from high-resolution heat capacity and x-ray studies of nematic-smectic-A transitions in liquid crystals are presented as a function of the ratio T(NA)/T(NI) of the nematic-smetic-A transition temperature to that of the nematic-isotropic transition. These results, which are the most extensive ever reviewed, show complex systematic trends that are compared with the theoretically predicted crossover from three-dimensional XY to tricritical behavior and the anisotropic behavior predicted to arise due to coupling between the smectic order parameter and director fluctuations.

引用

页码：2964 / 2971

页数：8

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