Physical Review Letters
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.
Yin, Y.; Shiyanovskii, Sergij V.; and Lavrentovich, Oleg (2007). Thermodielectric Bistability in Dual Frequency Nematic Liquid Crystal. Physical Review Letters 98(9). doi: 10.1103/PhysRevLett.98.097801 Retrieved from http://digitalcommons.kent.edu/cpippubs/221