The high frequency dielectric response of a ferroelectric liquid crystal |
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| Authors: | P G Costello Yu P Kalmykov J K Vij |
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| Institution: | 1. Department of Microelectronics and Electrical Engineering , Trinity College , Dublin , 2 , Ireland;2. Department of Microelectronics and Electrical Engineering , Trinity College , Dublin , 2 , Ireland;3. Institute of Radio Engineering and Electronics of the Russian Academy of Sciences , Vvedenskogo Sq. 1, Fryazino, Moscow Region , 141120 , Russia |
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| Abstract: | Abstract The temperature and frequency dependences of the complex dielectric susceptibility of a ferroelectric liquid crystal near the smectic C*-smectic A phase transition have been calculated using the classical and generalized Landau models. It is shown that although the dielectric response of the S*C phase consists generally of four modes (soft, Goldstone, and two high frequency polarization modes) only three bands appear in the dielectric loss spectrum of ferroelectric liquid crystals at the SA–S*C phase transition. These results are in agreement with recent experimental data. |
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