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Pseudo-lattice vibration in smectic liquid crystals

Authors
Journal
Physica B Condensed Matter
0921-4526
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/s0921-4526(98)01466-5
Keywords
  • Liquid Crystal
  • Smectic Phase
  • Low-Frequency Raman Spectra
  • Lattice Vibration

Abstract

Abstract Molecular motion in liquid-crystal phases of 4-octyl-4′-cyanobipheny (8CB) was studied with low-frequency Raman scattering and X-ray diffraction. A definite Raman band was found for the smectic phase with a peak at 9 cm −1. This band is assigned to the intermolecular vibration in the smectic layers with bimolecular structure, and is considered to indicate the existence of pseudo-lattice vibrations propagating along the direction perpendicular to the smectic layers.

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