Surface dynamics of a freely standing smectic-A film

Details Surface dynamics of a freely standing smectic-A film Surface dynamics of a freely standing smectic-A film

1997-09-12

arxiv.org/abs/cond-mat/9709149v1

Physics

Condensed Matter

Soft Condensed Matter

11 pages; 3 ps figures; latex, revtex

Scientific paper

10.1103/PhysRevE.57.5639

A theoretical analysis of surface fluctuations of a freely standing thermotropic smectic-A liquid crystal film is provided, including the effects of viscous hydrodynamics. We find two surface dynamic modes (undulation and peristaltic). For long wavelengths and small frequencies in a thin film, the undulation mode is the dominant mode. Permeation enters the theory only through the boundary conditions. The resulting power spectrum is compared with existing experiments. It is also shown that feasible light scattering experiments on a freely standing smectic-A film can reveal viscosity and elastic coefficients through the structure of the power spectrum of both the undulation and peristaltic modes.

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