中国物理B ›› 2009, Vol. 18 ›› Issue (4): 1560-1563.doi: 10.1088/1674-1056/18/4/044
张志东, 常春蕊, 马东来
Zhang Zhi-Dong(张志东)†, Chang Chun-Rui(常春蕊), and Ma Dong-Lai(马东来)
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 structure 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.
中图分类号: (Liquid crystals)