The Contribution of the Smectic-Nematic Interface to the Surface Energy

Details The Contribution of the Smectic-Nematic Interface to the Surface Energy The Contribution of the Smectic-Nematic Interface to the Surface Energy

1998-09-21

arxiv.org/abs/cond-mat/9809273v1

Phys. Rev. E 55 (1997) R1279-R1281

Physics

Condensed Matter

10 pages, revtex

Scientific paper

10.1103/PhysRevE.55.R1279

The contribution of the smectic-nematic interface to the surface energy of a nematic liquid crystal sample is analyzed. By means of a simple model it is shown that the surface energy depends on the thickness of the region over which the transition smectic-nematic takes place. For perfectly flat substrates this thickness is of the order of the correlation length entering in the transition. An estimate of this contribution shows that it is greater than the one arising from the nematic-substrate interaction. Moreover, it is also shown that the surface energy determined in this way presents a non-monotonic behavior with the temperature.

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