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  • Title: Influence of flexoelectricity above the nematic Fréedericksz transition.
    Author: Brown CV, Mottram NJ.
    Journal: Phys Rev E Stat Nonlin Soft Matter Phys; 2003 Sep; 68(3 Pt 1):031702. PubMed ID: 14524783.
    Abstract:
    Continuum theory is used to demonstrate that the presence of flexoelectricity significantly alters the response to an applied voltage of a homogeneous nematic liquid crystal cell above the ac Fréedericksz threshold voltage. In such a system there is a fitting degeneracy: we obtain very good fits between theory and experimental permittivity data using any value of the sum of flexoelectric coefficients, e(11)+e(33), between 0.0 C/m and 1.5 x 10(-11) C/m. The corresponding values of the nematic bend elastic constant show an inverse parabolic relationship with e(11)+e(33), with K33 being reduced down to 90% of its value when flexoelectricity is neglected.
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