Undulation instabilities in the meniscus of smectic membranes

Details Undulation instabilities in the meniscus of smectic membranes Undulation instabilities in the meniscus of smectic membranes

2010-12-09

arxiv.org/abs/1012.1955v1

Physics

Condensed Matter

Soft Condensed Matter

Submitted to PRL

Scientific paper

Using optical microscopy, phase shifting interferometry and atomic force microscopy, we demonstrate the existence of undulated structures in the meniscus of ferroelectric smectic-C* films. The meniscus is characterized by a periodic undulation of the smectic-air interface, which manifests itself in a striped pattern. The instability disappears in the untilted smectic-A phase. The modulation amplitude and wavelength both depend on meniscus thickness. We study the temperature evolution of the structure and propose a simple model that accounts for the observed undulations.

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