Abstract
We propose a method how the specific heat in superfluid4He in the presence of a constant heat current can be extracted from a second-sound experiment, if it is possible to measure the fluctuations of the temperature δT(x, t) and the heat current δQ(x, t). Within a renormalization-group theory we calculate the specific heat which depends on the angle between the heat current and the direction of the second-sound propagation.
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Haussmann, R. Specific heat in4He nearT λ in a finite heat current: Determination via second sound. J Low Temp Phys 107, 21–32 (1997). https://doi.org/10.1007/BF02396834
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DOI: https://doi.org/10.1007/BF02396834