NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2015, 6 (4), P. 489-500
The interaction of polarization charges in freely suspended smectic-C* films
D. A. Murich – Saint Petersburg State University, Ul’yanovskaya, 1, Petrodvoretz, Saint Petersburg 198504, Russia; murichdim@mail.ru
V. P. Romanov – Saint Petersburg State University, Ul’yanovskaya, 1, Petrodvoretz, Saint Petersburg 198504, Russia
S. V. Ul’yanov – Saint Petersburg State University, Ul’yanovskaya, 1, Petrodvoretz, Saint Petersburg 198504; Saint Petersburg State University of Commerce and Economics, Saint Petersburg 194021, Russia; ulyanov_sv@mail.ru
The fluctuations of the director orientation in a freely suspended smectic-C* fi lm were theoretically investigated. In the free energy expression of the fi lm, not only were the elastic energy and the weak external electric field interaction considered, the interaction of polarization charges arising from fluctuations of the polarization vector were also included. The correlation function of the director fluctuations was obtained for a film of nite thickness. Calculations of light scattering intensity were provided. It has been found that due to the interaction of polarization charges, the angular dependence of the scattering intensity signi cantly depends on the magnitude of spontaneous polarization.
Keywords: smectic-C*, freely suspended lms, polarization charges, correlation function, light scattering
intensity.
PACS 61.30.Dk, 61.30.Gd, 42.79.Hp, 42.70.Df
DOI 10.17586/2220-8054-2015-6-4-489-500
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