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.
Physical Review Letters
Copyright 2007 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevLett.98.097801
Yin, Y.; Shiyanovskii, Sergij V.; Lavrentovich, Oleg (2007). Thermodielectric Bistability in Dual Frequency Nematic Liquid Crystal. Physical Review Letters 98(9) doi: 10.1103/PhysRevLett.98.097801. Retrieved from https://oaks.kent.edu/cpippubs/221