Polar Smectic Films

Details Polar Smectic Films Polar Smectic Films

1998-11-02

arxiv.org/abs/cond-mat/9811023v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, REVTeX, 3 figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.82.3815

We report on a new experimental procedure for forming and studying polar smectic liquid crystal films. A free standing smectic film is put in contact with a liquid drop, so that the film has one liquid crystal/liquid interface and one liquid crystal/air interface. This polar environment results in changes in the textures observed in the film, including a boojum texture and a previously unobserved spiral texture in which the winding direction of the spiral reverses at a finite radius from its center. Some aspects of these textures are explained by the presence of a Ksb term in the bulk elastic free energy density that favors a combination of splay and bend deformations.

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