Michel Jean-Philippe, Lacaze Emmanuelle, Goldmann Michel, Gailhanou Marc, de Boissieu Marc, Alba Michel
INSP, Universités Paris 6 et 7, UMR-CNRS 7588, Campus Boucicaut, 140 rue de Lourmel, F-75015 Paris, France.
Phys Rev Lett. 2006 Jan 20;96(2):027803. doi: 10.1103/PhysRevLett.96.027803. Epub 2006 Jan 19.
We study the structure of very thin liquid crystal films frustrated by antagonistic anchorings in the smectic phase. In a cylindrical geometry, the structure is dominated by the defects for film thicknesses smaller than 150 nm and the detailed topology of the defects' cores can be revealed by x-ray diffraction. They appear to be split in half tube-shaped rotating grain boundaries (RGB). We determine the RGB spatial extension and evaluate its energy per unit length. Both are significantly larger than the ones usually proposed in the literature.
我们研究了近晶相中介于对抗性锚定作用下的超薄液晶薄膜的结构。在圆柱几何结构中，对于厚度小于150纳米的薄膜，其结构主要由缺陷主导，并且缺陷核心的详细拓扑结构可通过X射线衍射揭示。它们似乎分裂成两半的管状旋转晶粒边界（RGB）。我们确定了RGB的空间扩展，并评估了其单位长度的能量。两者都明显大于文献中通常提出的值。
