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Cooling low-dimensional electron systems into the microkelvin regime

Author

Listed:
  • Lev V. Levitin

    (University of London)

  • Harriet van der Vliet

    (University of London
    Oxford Instruments Nanoscience, Abingdon)

  • Terje Theisen

    (University of London)

  • Stefanos Dimitriadis

    (University of London
    Imperial College London)

  • Marijn Lucas

    (University of London)

  • Antonio D. Corcoles

    (University of London
    Thomas J. Watson Research Center)

  • Ján Nyéki

    (University of London)

  • Andrew J. Casey

    (University of London)

  • Graham Creeth

    (University College London
    Praesto Consulting)

  • Ian Farrer

    (University of Cambridge
    University of Sheffield)

  • David A. Ritchie

    (University of Cambridge)

  • James T. Nicholls

    (University of London)

  • John Saunders

    (University of London)

Abstract

Two-dimensional electron gases (2DEGs) with high mobility, engineered in semiconductor heterostructures host a variety of ordered phases arising from strong correlations, which emerge at sufficiently low temperatures. The 2DEG can be further controlled by surface gates to create quasi-one dimensional systems, with potential spintronic applications. Here we address the long-standing challenge of cooling such electrons to below 1 mK, potentially important for identification of topological phases and spin correlated states. The 2DEG device was immersed in liquid 3He, cooled by the nuclear adiabatic demagnetization of copper. The temperature of the 2D electrons was inferred from the electronic noise in a gold wire, connected to the 2DEG by a metallic ohmic contact. With effective screening and filtering, we demonstrate a temperature of 0.9 ± 0.1 mK, with scope for significant further improvement. This platform is a key technological step, paving the way to observing new quantum phenomena, and developing new generations of nanoelectronic devices exploiting correlated electron states.

Suggested Citation

  • Lev V. Levitin & Harriet van der Vliet & Terje Theisen & Stefanos Dimitriadis & Marijn Lucas & Antonio D. Corcoles & Ján Nyéki & Andrew J. Casey & Graham Creeth & Ian Farrer & David A. Ritchie & James, 2022. "Cooling low-dimensional electron systems into the microkelvin regime," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-28222-x
    DOI: 10.1038/s41467-022-28222-x
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    References listed on IDEAS

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    Cited by:

    1. M. Lucas & A. V. Danilov & L. V. Levitin & A. Jayaraman & A. J. Casey & L. Faoro & A. Ya. Tzalenchuk & S. E. Kubatkin & J. Saunders & S. E. de Graaf, 2023. "Quantum bath suppression in a superconducting circuit by immersion cooling," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    2. Sujatha Vijayakrishnan & F. Poitevin & Oulin Yu & Z. Berkson-Korenberg & M. Petrescu & M. P. Lilly & T. Szkopek & Kartiek Agarwal & K. W. West & L. N. Pfeiffer & G. Gervais, 2023. "Anomalous electronic transport in high-mobility Corbino rings," Nature Communications, Nature, vol. 14(1), pages 1-6, December.

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