Stenull Olaf, Lubensky T C
Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA.
Phys Rev Lett. 2005 Jan 14;94(1):018304. doi: 10.1103/PhysRevLett.94.018304. Epub 2005 Jan 10.
Smectic-C elastomers can be prepared by cross-linking, e.g., liquid crystal polymers, in the smectic-A phase followed by a cooling through the smectic-A to smectic-C phase transition. This transition from D(infinityh) to C(2h) symmetry spontaneously breaks rotational symmetry in the smectic plane as does the transition from a smectic-A to a biaxial smectic phase with D(2h) symmetry. We study these transitions and the emergent elasticity of the smectic-C and biaxial phases in three related models and show that these phases exhibit soft elasticity analogous to that of nematic elastomers.
近晶C弹性体可通过例如在近晶A相中交联液晶聚合物来制备，随后通过从近晶A到近晶C的相变进行冷却。从D（∞h）到C（2h）对称性的这种转变会自发地破坏近晶平面中的旋转对称性，从近晶A到具有D（2h）对称性的双轴近晶相的转变也是如此。我们在三个相关模型中研究了这些转变以及近晶C相和双轴相的出现的弹性，并表明这些相表现出类似于向列弹性体的软弹性。
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