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Hemine J, Legrand C, Daoudi A, et al. Electro-optical and dielectric characterizations of the Goldstone mode relaxation in ferroelectric chiral smectic C liquid crystals. J Phys Condens Matter. 2007;19(29):296203doi: 10.1088/0953-8984/19/29/296203.
Hemine, J., Legrand, C., Daoudi, A., Isaert, N., Kaaouachi, A. E., & Nguyen, H. T. (2007). Electro-optical and dielectric characterizations of the Goldstone mode relaxation in ferroelectric chiral smectic C liquid crystals. Journal of physics. Condensed matter : an Institute of Physics journal, 19(29), 296203. https://doi.org/10.1088/0953-8984/19/29/296203
Hemine, J, et al. "Electro-optical and dielectric characterizations of the Goldstone mode relaxation in ferroelectric chiral smectic C liquid crystals." Journal of physics. Condensed matter : an Institute of Physics journal vol. 19,29 (2007): 296203. doi: https://doi.org/10.1088/0953-8984/19/29/296203
Hemine J, Legrand C, Daoudi A, Isaert N, Kaaouachi AE, Nguyen HT. Electro-optical and dielectric characterizations of the Goldstone mode relaxation in ferroelectric chiral smectic C liquid crystals. J Phys Condens Matter. 2007 Jul 25;19(29):296203. doi: 10.1088/0953-8984/19/29/296203. Epub 2007 Jul 05. PMID: 21483074.
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J Phys Condens Matter. 2007 Jul 25;19(29):296203. doi: 10.1088/0953-8984/19/29/296203. Epub 2007 Jul 05.

Electro-optical and dielectric characterizations of the Goldstone mode relaxation in ferroelectric chiral smectic C liquid crystals.

Journal of physics. Condensed matter : an Institute of Physics journal

J Hemine, C Legrand, A Daoudi, N Isaert, A El Kaaouachi, H T Nguyen

Affiliations

  1. Laboratoire de Physique de la Matière Condensée, Université Hassan II, FST Mohammedia, BP 146, Mohammedia, Morocco.

PMID: 21483074 DOI: 10.1088/0953-8984/19/29/296203

Abstract

We report structural (helical pitch), electro-optical (tilt angle and spontaneous polarization) and dielectric (Goldstone mode) investigations of ferroelectric liquid crystals (FLCs) exhibiting the chiral smectic C phase (SmC(*)). All these characterizations were performed on two pure FLCs showing the SmC(*)-SmA-N(*) phase sequence and having small pitch, high spontaneous polarization and a large relaxation frequency. We have determined the Goldstone rotational viscosity and the twist elastic constant in the SmC(*) phase from the helical pitch, tilt angle, polarization, dielectric strength experimental data and from the relaxation frequency of the Goldstone-mode relaxation. An Arrhenius-type behaviour of the Goldstone rotational viscosity was obtained and the corresponding activation energies were evaluated.

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