Influence of director fluctuations on the electric-field phase diagrams of nematic liquid crystalsSurajit Dhara and N. V. Madhusudana
Raman Research Institute - C.V. Raman Avenue, Bangalore 560 080, India
(Received 5 January 2004; accepted in final form 24 May 2004)
We report the first experimental high-electric-field phase diagram of a nematic liquid crystal with negative dielectric anisotropy. The variation of the paranematic-nematic transition temperature is essentially linear with |E|, whereas the Landau-de Gennes theory predicts a quadratic variation. It is argued that the quenching of director fluctuations by the field contributes significantly to the thermodynamics of the transition.
64.70.Md - Transitions in liquid crystals.
61.30.Gd - Orientational order of liquid crystals; electric and magnetic field effects on order.
61.30.Dk - Continuum models and theories of liquid crystal structure.
© EDP Sciences 2004