Length scale dependence of chiral symmetry breaking in free-standing films of achiral smectic С
Demikhov E.I., Dolganov V.K.
The textures of a smectic С phase in free-standing films of the SchifT base 50.6 are studied as a function of the number of layers and temperature. Periodic stripes with alternating contrast are observed in SmA boundary layers. On further cooling a transition to the splay stripes occurs in the smectic A temperature interval. In the smectic С phase all the periodic textures disappear, whereas in films with one free boundary a periodic arrangement of splay stripes is found. Mechanisms of symmetry breaking are discussed. PACS 64.70.Md, 68.15.-fe