Prestipino Santi, Saija Franz
Dipartimento di Fisica, Università degli Studi di Messina, Contrada Papardo, 98166 Messina, Italy.
J Chem Phys. 2007 May 21;126(19):194902. doi: 10.1063/1.2737041.
The authors study a simple model of a nematic liquid crystal made of parallel ellipsoidal particles interacting via a repulsive Gaussian law. After identifying the relevant solid phases of the system through a careful zero-temperature scrutiny of as many as eleven candidate crystal structures, they determine the melting temperature for various pressure values, also with the help of exact free energy calculations. Among the prominent features of this model are pressure-driven reentrant melting and the stabilization of a columnar phase for intermediate temperatures.
作者研究了一种由平行椭球形颗粒通过排斥高斯定律相互作用构成的向列型液晶的简单模型。在通过对多达十一种候选晶体结构进行细致的零温度审查确定了系统的相关固相之后，他们还借助精确的自由能计算确定了各种压力值下的熔点。该模型的显著特征包括压力驱动的重入熔化以及中间温度下柱状相的稳定化。
