Monte Carlo simulations of biaxial structure in thin hybrid nematic film based upon spatially anisotropic pair potential

• 来源期刊: 中国物理B（英文版）
• 关键词: hybrid nematic film biaxial structure spatially anisotropic pair potential Monte Carlo simulation
• 年，卷（期）: 2009,（4）
• 页码范围: 1560-1563
• 页数: 4页
• 语种: 英文

摘要

Hybrid nematic films have been studied by Monte Carlo simulations using a lattice spin model,in which the pair potential is spatially anisotropic and dependent on elastic constants of liquid crystals.We confirm in the thin hybrid nematic film the existence of a biaxially nonbent structure and the structarc transition from the biaxial to the bent-director structure,which is similar to the result obtained using the Lebwohl-Lasher model.However,the step-like director's profile,characteristic for the biaxial structure,is spatially asymmetric in the film because the pair potential leads to K1≠K3.We estimate the upper cell thickness to be 69 spin layers,in which the biaxial structure can be found.