Publication Title

Physical Review Letters

Publication Date

3-2-2007

Document Type

Article

DOI

10.1103/PhysRevLett.98.097801

Disciplines

Physics

Abstract

We report on a thermodielectric bistability in dual frequency nematic liquid crystals (LCs) caused by the anisotropic nature of dielectric heating and director reorientation in an electric field. The bistability is a result of the positive feedback loop: director reorientation -> anisotropic dielectric heating -> dielectric anisotrophy -> director reorientation. We demonstrate both experimentally and theoretically that two states with different temperature and director orientation, namely, a cold planar state and a hot homeotropic state coexist in a LC cell for a certain frequency and amplitude range of the applied voltage.

Comments

Copyright 2007 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevLett.98.097801


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