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

Author

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  • de Oliveira, I.N.
  • Lyra, M.L.

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.

Suggested Citation

  • de Oliveira, I.N. & Lyra, M.L., 2004. "Fluctuation-induced interaction in smectic films under an ordering external field," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 344(3), pages 595-600.
    • Handle: RePEc:eee:phsmap:v:344:y:2004:i:3:p:595-600
    DOI: 10.1016/j.physa.2004.06.037
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