Thermal-conductivity studies near the smectic-A-hexatic-B transition in a liquid-crystal compound

G. Nounesis, C. C. Huang, J. W. Goodby

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23 Scopus citations


High-resolution thermal-conductivity and heat-capacity studies on the same sample have been carried out near the smectic-A-hexatic-B transition of n-hexyl-4' -n-pentyloxybiphenyl-4-carboxylate (65OBC). A power-law fitting with background contribution to the thermal conductivity anomaly leads to a dynamic critical exponent a=0.51 and a ratio of critical amplitudes +-=0.93. We will discuss our results on the basis of a dynamic scaling. The thermal diffusivity shows a pronounced drop near the transition, which clearly demonstrates critical slowing down of the thermal fluctuations. mal fluctuations.

Original languageEnglish (US)
Pages (from-to)1712-1715
Number of pages4
JournalPhysical review letters
Issue number16
StatePublished - 1986

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