Abstract
We report on an investigation into confined geometry effects and critical currents of superfluid3He in a single circular cylindrical channel. The diameter of the channel, 0.7 µm, is of the order of the (temperature-dependent) coherence length and its aspect ratio is ∼10. The reduction of the critical temperature demonstrates diffuse scattering on the solid walls of the microchannel. Using the Ginzburg-Landau formulation, we derive a model for the critical current and the critical temperature in a small, infinitely long, cylindrical channel with a circular cross section. The measured reductions of these quantities are in reasonable agreement with the predictions of the model.
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Pekola, J.P., Davis, J.C., Yu-Qun, Z. et al. Suppression of the critical current and the superfluid transition temperature of3He in a single submicron cylindrical channel. J Low Temp Phys 67, 47–63 (1987). https://doi.org/10.1007/BF01070649
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DOI: https://doi.org/10.1007/BF01070649