Rjili M, Gharbi A, Othman T, Marcerou J P
Laboratoire de Physique de la Matière Molle et de la Modélisation Électromagnétique, Faculté des Sciences de Tunis, Université Tunis El Manar, 2092 El Manar Tunis, Tunisia.
Centre de Recherches Paul Pascal, Université Bordeaux 1, 115, Avenue Albert-Schweitzer, 33600 Pessac, France†
Phys Rev E Stat Nonlin Soft Matter Phys. 2014 Feb;89(2):022507. doi: 10.1103/PhysRevE.89.022507. Epub 2014 Feb 18.
We are interested in the chiral tilted smectic subphases, smectic-C(tilted)(), including commensurate structures as well as the incommensurate smectic-C(α)() one. The continuum theory defines two scalar order parameters I and J, which can be coupled with an external electric field through a linear term I × E and a dielectric term J × E(2). We have calculated the changes due to these terms in the phase diagrams in the (α,η) plane, where α comes from the spontaneous twist and η measures the strength of the biaxial order. The coupling with an external electric field induces the expansion of the areas with spontaneous polarization and the appearance of an electroazimuthal effect.
我们对手性倾斜近晶亚相感兴趣，包括近晶 - C（倾斜）（），其中既有相称结构，也有不相称的近晶 - C（α）（）结构。连续统理论定义了两个标量序参量I和J，它们可以通过线性项I×E和介电项J×E²与外部电场耦合。我们计算了在（α，η）平面的相图中由于这些项引起的变化，其中α来自自发扭曲，η衡量双轴序的强度。与外部电场的耦合导致具有自发极化的区域扩大，并出现电方位角效应。
