Biaxial Nematic Phase in Model Bent-Core Systems

被引：26

作者：

Grzybowski, Piotr ^{[1
]}

Longa, Lech

机构：

[1] Jagiellonian Univ, Dept Stat Phys, Marian Smoluchowski Inst Phys, Krakow, Poland

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 02期

关键词：

SHAPED MOLECULES; LIQUID-CRYSTALS; FLUID; ORDER;

D O I：

10.1103/PhysRevLett.107.027802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We determine the bifurcation phase diagrams with isotropic (I), uniaxial (N-U) and biaxial (N-B) nematic phases for model bent-core mesogens using Onsager-type theory. The molecules comprise two or three Gay-Berne interacting ellipsoids of uniaxial and biaxial shape and a transverse central dipole. The Landau point is found to turn into an I-N-B line for the three-center model with a large dipole moment. For the biaxial ellipsoids, a line of Landau points is observed even in the absence of the dipoles.

引用

页数：4

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