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Thermal transport of helium-3 in a strongly confining channel

Author

Listed:
  • D. Lotnyk

    (Cornell University)

  • A. Eyal

    (Cornell University
    Technion)

  • N. Zhelev

    (Cornell University)

  • T. S. Abhilash

    (Cornell University
    VTT Technical Research Centre of Finland Ltd)

  • E. N. Smith

    (Cornell University)

  • M. Terilli

    (Cornell University)

  • J. Wilson

    (Cornell University
    SUNY Geneseo)

  • E. Mueller

    (Cornell University)

  • D. Einzel

    (Walther Meissner Institut)

  • J. Saunders

    (Royal Holloway University of London)

  • J. M. Parpia

    (Cornell University)

Abstract

The investigation of transport properties in normal liquid helium-3 and its topological superfluid phases provides insights into related phenomena in electron fluids, topological materials, and putative topological superconductors. It relies on the measurement of mass, heat, and spin currents, due to system neutrality. Of particular interest is transport in strongly confining channels of height approaching the superfluid coherence length, to enhance the relative contribution of surface excitations, and suppress hydrodynamic counterflow. Here we report on the thermal conduction of helium-3 in a 1.1 μm high channel. In the normal state we observe a diffusive thermal conductivity that is approximately temperature independent, consistent with interference of bulk and boundary scattering. In the superfluid, the thermal conductivity is only weakly temperature dependent, requiring detailed theoretical analysis. An anomalous thermal response is detected in the superfluid which we propose arises from the emission of a flux of surface excitations from the channel.

Suggested Citation

  • D. Lotnyk & A. Eyal & N. Zhelev & T. S. Abhilash & E. N. Smith & M. Terilli & J. Wilson & E. Mueller & D. Einzel & J. Saunders & J. M. Parpia, 2020. "Thermal transport of helium-3 in a strongly confining channel," Nature Communications, Nature, vol. 11(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18662-8
    DOI: 10.1038/s41467-020-18662-8
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    Cited by:

    1. Samuli Autti & Richard P. Haley & Asher Jennings & George R. Pickett & Malcolm Poole & Roch Schanen & Arkady A. Soldatov & Viktor Tsepelin & Jakub Vonka & Vladislav V. Zavjalov & Dmitry E. Zmeev, 2023. "Transport of bound quasiparticle states in a two-dimensional boundary superfluid," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    2. S. Autti & P. J. Heikkinen & J. Nissinen & J. T. Mäkinen & G. E. Volovik & V. V. Zavyalov & V. B. Eltsov, 2022. "Nonlinear two-level dynamics of quantum time crystals," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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