Divergent thermal diffusivity at a mean-field tricritical point

E. K. Hobbie, H. Y. Liu, C. C. Huang, Ch Bahr, G. Heppke

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


A sharp divergence is observed in the thermal diffusivity very close to the transition temperature of a smectic-Asmectic-C transition that is known to be at a mean-field tricritical point. Similar but less pronounced behavior near other smectic-Asmectic-C transitions reveals a relationship between the size of this anomaly and the proximity of the system to a tricritical point. An application of the Ginzburg criterion suggests that this novel behavior might indicate a crossover to an asymptotic critical regime.

Original languageEnglish (US)
Pages (from-to)1771-1774
Number of pages4
JournalPhysical review letters
Issue number13
StatePublished - 1991


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