Evidence of deVries structure in a smectic-A liquid crystal observed by polarized Raman scattering
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2005Citation:
N. Hayashi, T. Kato, A. Fukuda, J. K. Vij, Yu. P. Panarin et al, Evidence of deVries structure in a smectic-A liquid crystal observed by polarized Raman scattering, Physical Review E, 71, 4, 2005, 041705-1 - 041705-8Download Item:
Abstract:
The second- and fourth-order apparent orientational order parameters of the core part of the molecule kP2lapp
and kP4lapp, have been measured by polarized vibrational Raman spectroscopy for a homogeneously aligned
ferroelectric smectic liquid crystal with three dimethyl siloxane groups in the achiral terminal chain, which
shows de Vries?type phenomena, i.e., very large electroclinic effect in the smectic-A sSm-Ad phase and a
negligible layer contraction at the phase transition between the Sm-A and Sm-C* phases. The apparent orientational
order parameters of the rigid core part of the molecule are extremely small both with and without the
external electric field in Sm-A. These results provide evidence for the existence of the de Vries Sm-A phase,
where the local molecular director is tilted at a large angle.
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Grant Number
Science Foundation Ireland (SFI)
Author's Homepage:
http://people.tcd.ie/jvijhttp://people.tcd.ie/ypanarin
http://people.tcd.ie/atsuof
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PUBLISHEDSponsor:
Science Foundation Ireland (SFI)Type of material:
Journal ArticleSeries/Report no:
Physical Review E71
4
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Electronic & Electrical EngineeringDOI:
http://dx.doi.org/10.1103/PhysRevE.71.041705Metadata
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