Smectic-A-smectic-C-smectic-C* Lifshitz point in mixtures of chiral and achiral smectic liquid crystals

被引：3

作者：

Mukherjee, Prabir K. ^{[1
]}

机构：

[1] Govt Coll Engn & Text Technol, Dept Phys, Serampore 712201, Hooghly, India

来源：

JOURNAL OF MOLECULAR LIQUIDS | 2015年 / 204卷

关键词：

Ferroelectric liquid crystals; Lifshitz point; Phase transition; TRICRITICAL BEHAVIOR; PHASE-TRANSITION; HEAT-CAPACITY; SPONTANEOUS POLARIZATION; TILT-ANGLE; CROSSOVER; FIELD; MODEL;

D O I：

10.1016/j.molliq.2015.01.012

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A phenomenological theory to describe the smectic-A-smectic-C transition, smectic-A-smectic-C* transition and smectic-C-smectic-C* transition in liquid mixtures is proposed. The influence of the concentration of the chiral liquid crystal on these phase transitions is discussed by varying the coupling between various order parameters. The phase diagrams of the thermodynamic parameters, wave vector, helix pitch, tilt angle and polarization are studied and a possible smectic-A-smectic-C-smectic-C* Lifshitz point is predicted. We present a detailed analysis of the different phases that can occur and analyze the question under which conditions a Lifshitz point is observed in the phase diagram. Calculations based on this model agree qualitatively with experiment. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：10 / 14

页数：5

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