Numerical study of surface-induced reorientation and smectic layering in a nematic liquid crystal

Details Numerical study of surface-induced reorientation and smectic layering in a nematic liquid crystal Numerical study of surface-induced reorientation and smectic layering in a nematic liquid crystal

2000-07-03

arxiv.org/abs/cond-mat/0007040v2

Physics

Condensed Matter

Soft Condensed Matter

LaTeX, 17 pages, with 4 postscript figures

Scientific paper

10.1103/PhysRevE.63.021510

Surface-induced profiles of both nematic and smectic order parameters in a nematic liquid crystal, ranging from an orienting substrate to "infinity", were evaluated numerically on base of an extended Landau theory. In order to obtain a smooth behavior of the solutions at "infinity" a boundary energy functional was derived by linearizing the Landau energy around its equilibrium solutions. We find that the intrinsic wave number of the smectic structure, which plays the role of a coupling between nematic and smectic order, strongly influences the director reorientation. Whereas the smectic order is rapidly decaying when moving away from the surface, the uniaxial nematic order parameter shows an oscillatory behavior close to the substrate, accompanied by a non-zero local biaxiality.

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