通过Monte Carlo方法研究了在磁场诱导下的双轴向列相液晶的Freedericksz转变,在模拟的过程中采用了London色散力近似.考虑3种不同的排列方式,通过改变3个分子轴的磁化率和磁场方向,讨论了9种不同的Fréedericksz转变并分别给出了相应的阈值磁场,通过计算机的模拟实现了短轴u和v的转变,长轴w和短轴u的转变以及长轴w和短轴v的转变.模拟结果表明,在给定假设的情况下满足单一弹性常数近似.研究结果对发展双轴液晶显示器件有一定的理论指导意义.
参考文献
| [1] | Freiser M J.Ordered states of a nematic liquid[J].Phys.Rev.Lett.,1970,24(19):1041-1043. |
| [2] | Yu L J,Saupe A.Observation of a biaxial nematic phase in potassium Iaurate-1-decanol water mixtures[J].Phys.Rev.Lett.,1980,45(12):1000-1003. |
| [3] | Luckhurst G R.Biaxial nematic liquid crystals:Fact or fiction?[J].Thin Solid Films,2001,393 (12):40-52. |
| [4] | Berardi R,Muccioli L,Zannoni C.Field response and switching times in biaxial nematics[J].J.Chem.Phys.,2008,128 (2):024905. |
| [5] | Liu H.Theory of nine elastic constants of biaxial nematics[J].Chin.Phys.B,2008,17(03):1060-1069. |
| [6] | Sonnet A M,Virga E G,Durand G E.Dielectric shape dispersion and biaxial transitions in nematic liquid crystal[J].Phys.Rev.E,2003,67(6):061701. |
| [7] | Zhang Z D,Zhang D X,Sun Y B. Magnetic-field-induced weak order in bematic liquid crystal formed by biaxial molecules[J].Chin.Phys.Lett.,2000,17(10):749-751. |
| [8] | Metropolis N,Rosenbluth A W,Rosenbluth M N,et al. Equation of State Calculations by Fast Computing Machines[J].J.Chem.Phys.,1953,21(6):1087-1092. |
| [9] | 杨培培,刘红(小),刘红.双轴向列相液晶的Monte Carlo模拟[J].计算物理,2009,26(4):597-602. |
| [10] | Bac C G,Peredez R,Vasquez C,et al. Three-dimensional rotational langevin dynamics and the lebwohl-lasher model[J].Phys.Rev.E,2001,63(4 Pt 1):042701. |
| [11] | Saupe A.Elastic and flow properties of biaxial nematics[J].J.Chem.Phys.,1981,75(10):5118-5124. |
| [12] | Brand H,Pleiner H.Number of elastic coefficients in a biaxial nematic liquid crystal[J].Phys.Rev.A,1982,26:1783-1784. |
| [13] | Govers E,Vertogen G.Elastic continuum theory of biaxial nematics[J].Phys.Rev.A,1984,30(4):1998-2000. |
| [14] | Zhang Z D,Ye W J.The elastic distortion and stability of biaxial nematic liquid crystal on the surface grooves[J].Liq.Cryst.,2009,36(8):885-888. |
| [15] | Kini U D,Chandrasekhar S.Elastic constants of a biaxial nematic liquid crystal[J].Physica A:Statistical and Theoretical Physics,1989,156 (1):364-375. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%