Phys. Rev. Lett. 100, 237801 (2008) [4 pages]Polarity-Dependent Dielectric Torque in Nematic Liquid CrystalsReceived 12 December 2007; published 13 June 2008 The dielectric dispersion in the uniaxial nematic liquid crystals affects the switching dynamics of the director, as the dielectric torque is determined by not only the present values of the electric field and director but also by their past values. We demonstrate that this “dielectric memory” leads to an unusual contribution to the dielectric torque that is linear in the present field and thus polarity sensitive. This torque can be used to accelerate the “switch-off” phase of director dynamics. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.237801
DOI:
10.1103/PhysRevLett.100.237801
PACS:
61.30.Dk, 42.79.Kr, 77.22.Gm, 77.84.Nh
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