Switching mechanism in polar columnar mesophases made of bent-core molecules
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The behavior of polar columnar phases made of bent shaped molecules (B_1Rev and B_1RevTilted) was studied under applied electric field. There are two competing mechanisms of switching in polar B_1RevTilted columnar phase: the collective rotation around the long molecular axis and the collective rotation around the tilt cone. Respectively monostable and bistable optical switching is observed for antiferroelectric B_1RevTilted phase. The main factor discriminating the type of the switching is a width of the column cross-section.
19 pages including figures and tables. Submitted to PRE (21st May 2004) Resubmitted to PRE (21st July 2004)
19 pages including figures and tables. Submitted to PRE (21st May 2004) Resubmitted to PRE (21st July 2004)