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ZB 10 - Soft Condensed Matter (R. Holyst)

We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!
We are different, but we all do great Science; and we have a lot of fun doing it!

Publication

LANDAU-PEIERLS INSTABILITY, X-RAY-DIFFRACTION PATTERNS, AND SURFACE FREEZING IN THIN SMECTIC FILMS

Author(s): HOLYST, R
Title: LANDAU-PEIERLS INSTABILITY, X-RAY-DIFFRACTION PATTERNS, AND SURFACE FREEZING IN THIN SMECTIC FILMS
Abstract: A model of x-ray diffraction for thin smectic-A liquid-crystal film is The effect of the smectic-layer displacement fluctuations correlations and the molecular form factor on the interlayer and the x-ray-diffraction pattern is discussed. In thin films influence of the displacement-displacement correlation function on x-ray-diffraction pattern is very small and can be neglected in the of experimental data. On the other hand, both the term (Debye-Waller factor) and molecular form produce strong measurable effects and so can be determined. We the dependence of displacement fluctuations, calculated in the of the Landau-de Gennes model, on the smectic elastic and the smectic-vapor surface tension and show that these can be determined from the x-ray-diffraction pattern. The of the hydrodynamic (collective) layer fluctuations and the molecular-motion fluctuations shows that the latter can be in comparison to the former. The fluctuation amplitudes by the model agree within 5\% with the recent experimental performed on smectic-I on -C films. In thin smectic films
Pages: 3692-3709
Journal: PHYSICAL REVIEW A
Volume: 44
ID: ISI:A1991GH32000044
Year: 1991
DOI: 10.1103/PhysRevA.44.3692