Influence of flexoelectricity above the nematic Fréedericksz transition

Brown, C. V. and Mottram, N. J. (2003) Influence of flexoelectricity above the nematic Fréedericksz transition. Physical Review E, 68(3), 031702. (doi: 10.1103/PhysRevE.68.031702) (PMID:14524783)

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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, e11+e33, between 0.0 C/m and 1.5×10−11C/m. The corresponding values of the nematic bend elastic constant show an inverse parabolic relationship with e11+e33, with K33 being reduced down to 90% of its value when flexoelectricity is neglected.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Mottram, Professor Nigel
Authors: Brown, C. V., and Mottram, N. J.
College/School:College of Science and Engineering > School of Mathematics and Statistics > Mathematics
Journal Name:Physical Review E
Publisher:American Physical Society
ISSN (Online):1095-3787
Published Online:05 September 2003

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