四阶耦合能对半无限液晶界面特性的影响

Effect of Quartic Coupling Energy on Surface Properties of Semi-Infinity Liquid Crystal

应用Fukuda锚泊能描述液晶与界面的相互作用,即将Fukuda公式转变为序参数的表示式,它与RP(Rapini-Papoular)公式的序参数表示式比较多了四阶耦合能项;然后,讨论四阶耦合能的存在对液晶的相变及界面润湿的影响.结果表明:四阶耦合能是负能量,它能降低界面液晶的相变温度,但没有改变其他参量对相变的影响;在界面润湿方面,四阶耦合能使界面的paranematic润湿的相图发生变化.

Fukuda anchoring is applied as the surface anchoring enengy and is switched into expression of order parameter.When compared to the RP formula,Fukuda anchoring appears a quartic coupling energy than that of RP（Rapini-Papoular）form.The influence of quartic coupling energy on phase transition of the liquid crystal and wetting behavior is discussed.The result is：because quartic is negative,it reduces the phase transition temperature of liquid crystal on the surface,but do not change the dependence of phase transition on other parameters.On surface wetting,quartic coupling energy changes the wetting diagram.