Physical Review Letters
phase-transitions, achiral molecules, polarization, domains
The first experimental evidence for triclinic symmetry of bulk smectic liquid-crystal samples of achiral banana-shaped molecules is presented. This phase corresponds to the so-called Sm-C-G phase consisting of biaxial molecules and characterized by two tilt directions with respect to the layer normal: tilt of the molecular plane (clinic) and tilt of the molecular kink direction (leaning). Each smectic layer has a polarization component normal to the smectic layers (C-1 symmetry). The observations suggest that the phase tentatively labeled as B-7 is identical with the Sm-C-G phase.
Jakli, Antal; Kruerke, D.; Sawade, Hans; and Heppke, G. (2001). Evidence for Triclinic Symmetry in Smectic Liquid Crystals of Bent-Shape Molecules. Physical Review Letters 86(25), 5715-5718. doi: 10.1103/PhysRevLett.86.5715 Retrieved from https://digitalcommons.kent.edu/cpippubs/178