Publication Title

Physical Review E

Publication Date

4-15-2001

Document Type

Article

DOI

10.1103/PhysRevE.63.041702

Keywords

achiral molecules, smectic phases, X-ray, films, polarization, orientation

Disciplines

Physics

Abstract

Null-transmission ellipsometry and depolarized light microscopy have been performed on free-standing films of three achiral banana-shaped compounds in the B2 phase. Our results support a two-layer unit cell previously proposed to explain the observed antiferroelectricity in thin films and bulk samples. We have studied thicker films than previously reported and have found no deviations in the film structure from the earlier findings. Moreover, we can determine the layer spacing, the molecular tilt from the layer normal, and the three principal indices of refraction in the molecular reference frame.

Comments

Copyright 2001 American Physical Society. Available on publisher's site at http://dx.doi.org/10.1103/PhysRevE.63.041702


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