Fluctuation-induced interaction in smectic films under an ordering external field
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.
Year of publication: |
2004
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Authors: | de Oliveira, I.N. ; Lyra, M.L. |
Published in: |
Physica A: Statistical Mechanics and its Applications. - Elsevier, ISSN 0378-4371. - Vol. 344.2004, 3, p. 595-600
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Publisher: |
Elsevier |
Subject: | Smectic liquid crystals | Fluctuation-induced phenomena | Diamagnetic anisotropy |
Saved in:
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