Simple explanation of the anomalous transport of heat near two smectic liquid-crystal phase transitions

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Abstract
A detailed scaling argument is used to derive an expression for the thermal diffusivity in terms of the heat capacity, correlation length, and susceptibility. This simple model gives good fits to our experimental data near the smectic-A–hexatic-B transition of one liquid-crystal compound and the smectic-A–smectic-C transition of another. The critical dynamics of both transitions is assumed to be described by the conventional theory.