Fluctuation-induced interaction in smectic films under an ordering external field

I.N. de Oliveira and M.L. Lyra

Physica A: Statistical Mechanics and its Applications, 2004, vol. 344, issue 3, 595-600

Abstract: Within a quadratic functional integral approach, we investigate the influence of an external magnetic field in the fluctuation-induced surface–surface interaction of free-standing smectic liquid crystals. We find that the typical 1/l decay of the Casimir-like contribution to the free-energy of a film with thickness l in the absence of external fields is replaced by a faster 1/l2 decay for finite fields. We show the existence of a characteristic thickness delimiting the crossover between these distinct regimes which continuously decreases as stronger fields are considered.

Keywords: Smectic liquid crystals; Fluctuation-induced phenomena; Diamagnetic anisotropy (search for similar items in EconPapers)
Date: 2004
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:344:y:2004:i:3:p:595-600

DOI: 10.1016/j.physa.2004.06.037

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