Vasseur H, Mettout B
LPMC, Université de Picardie, 80039 Amiens, France.
Phys Rev E Stat Nonlin Soft Matter Phys. 2002 Oct;66(4 Pt 1):041503. doi: 10.1103/PhysRevE.66.041503. Epub 2002 Oct 28.
In freely suspended chiral smectic films, the molecules tilt at the surfaces above the bulk ferroelectric transition temperature. The tilt angle at the two surfaces can be either equal (synclinic surface phase) or opposite (anticlinic surface phase) on each surface of the film. We propose a realistic theoretical model accounting for the stability and properties of these two structures, based on competing surface interactions. The anticlinic phase is stable for sufficiently thin samples and high temperatures. We predict a reentrant SmA phase merging with the surface phases at a three-phase point.
在自由悬浮的手性近晶薄膜中，分子在体铁电转变温度以上的表面处倾斜。在薄膜的每个表面上，两个表面的倾斜角可以相等（顺斜表面相）或相反（反斜表面相）。我们基于相互竞争的表面相互作用，提出了一个解释这两种结构的稳定性和性质的现实理论模型。对于足够薄的样品和高温，反斜相是稳定的。我们预测在三相点处会出现一个与表面相合并的再入SmA相。
