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Surface anchoring breaking in smectic C liquid crystals

M. PETROV1,* , B. KATRANCHEV1, H. NARADIKIAN1

Affiliation

  1. Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria

Abstract

The surface anchoring in a smectic C (SC) liquid crystal, in contrast to that in nematics, has been studied very scantily. Here we present the angular dependence of the surface anchoring energy of the SC with a temperature independent tilt angle (8OBA) on two surfaces: SiOx/ITO/glass and a holographic diffraction grating. This dependence was measured using a twist – cell method. The SC single local monocrystal (SML) rotation, starting at a critical bulk twist, reveals surface anchoring breaking. A model for the bulk twist influence on the SC SLMs is suggested..

Keywords

Liquid Crystals, Smectic C, Single monocrystal, Surface anchoring.

Submitted at: Nov. 28, 2006
Accepted at: Feb. 15, 2007

Citation

M. PETROV, B. KATRANCHEV, H. NARADIKIAN, Surface anchoring breaking in smectic C liquid crystals, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 2, pp. 442-445 (2007)