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Geometry and Thermodynamics pp 395–403Cite as

Phasons in Ferroelectric Liquid Crystals

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Part of the book series: NATO ASI Series ((NSSB,volume 229))

Abstract

In ferroelectric liquid crystals the orientational order fluctuations, which are of relaxational type, can be decomposed into a phason and amplitudon mode, and were observed with photon correlation spectroscopy. The phasons show no gap and have parabolic dispersion relation with the minimum at a finite wave vector. In the Sm A phase, both modes become a degenerate soft mode. Its dispersion also has a minimum at a finite wave vector. At wave vectors oblique with respect to the helical axis the phason dispersion relation splits at points qz=0 and qz=2q0.

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Author information

Authors and Affiliations

  1. J. Stefan Institute, University of Ljubljana, 61000, Ljubljana, Yugoslavia

    M. Čopič, I. Drevenšek, I. Muševič & R. Blinc

Authors
  1. M. Čopič
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  2. I. Drevenšek
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  3. I. Muševič
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  4. R. Blinc
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Editor information

Editors and Affiliations

  1. National Center of Telecommunication Studies, Bagneux, France

    J.-C. Tolédano

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Čopič, M., Drevenšek, I., Muševič, I., Blinc, R. (1990). Phasons in Ferroelectric Liquid Crystals. In: Tolédano, JC. (eds) Geometry and Thermodynamics. NATO ASI Series, vol 229. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3816-5_35

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  • DOI: https://doi.org/10.1007/978-1-4615-3816-5_35

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4613-6702-4

  • Online ISBN: 978-1-4615-3816-5

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