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  • Title: Thermodielectric bistability in dual frequency nematic liquid crystal.
    Author: Yin Y, Shiyanovskii SV, Lavrentovich OD.
    Journal: Phys Rev Lett; 2007 Mar 02; 98(9):097801. PubMed ID: 17359197.
    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.
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