Journal
PHYSICAL REVIEW LETTERS
Volume 86, Issue 25, Pages 5715-5718Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.86.5715
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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.
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