Das Asok K, Mukherjee Prabir K
Department of Physics, Surendranath College, 24/2 M. G. Road, Kolkata 700 009, India.
J Chem Phys. 2008 Jun 21;128(23):234907. doi: 10.1063/1.2940349.
A phenomenological approach to the description of the smectic-A to smectic-C phase transition in a liquid crystal mixture is proposed. The problem of the first or second order transition is explored by means of the variation of the concentration. The influence of the concentration on this transition is discussed by varying the coupling between the concentration variable and the order parameters. We show that a tricritical point on the smectic-A to smectic-C phase transition line can be achieved under certain conditions. The theoretical prediction is found to be in good qualitative agreement with experimental results.
提出了一种用唯象学方法描述液晶混合物中近晶A相到近晶C相的相变。通过浓度变化来研究一级或二级相变问题。通过改变浓度变量与序参量之间的耦合来讨论浓度对该相变的影响。我们表明，在一定条件下，近晶A相到近晶C相的相变线上可以出现一个三临界点。理论预测与实验结果在定性上吻合良好。
