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Quasi-2D Fermi surface in the anomalous superconductor UTe2

Author

Listed:
  • A. G. Eaton

    (University of Cambridge)

  • T. I. Weinberger

    (University of Cambridge)

  • N. J. M. Popiel

    (University of Cambridge)

  • Z. Wu

    (University of Cambridge)

  • A. J. Hickey

    (University of Cambridge)

  • A. Cabala

    (Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics)

  • J. Pospíšil

    (Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics)

  • J. Prokleška

    (Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics)

  • T. Haidamak

    (Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics)

  • G. Bastien

    (Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics)

  • P. Opletal

    (Japan Atomic Energy Agency)

  • H. Sakai

    (Japan Atomic Energy Agency)

  • Y. Haga

    (Japan Atomic Energy Agency)

  • R. Nowell

    (National High Magnetic Field Laboratory)

  • S. M. Benjamin

    (National High Magnetic Field Laboratory)

  • V. Sechovský

    (Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics)

  • G. G. Lonzarich

    (University of Cambridge)

  • F. M. Grosche

    (University of Cambridge)

  • M. Vališka

    (Charles University, Faculty of Mathematics and Physics, Department of Condensed Matter Physics)

Abstract

The heavy fermion paramagnet UTe2 exhibits numerous characteristics of spin-triplet superconductivity. Efforts to understand the microscopic details of this exotic superconductivity have been impeded by uncertainty regarding the underlying electronic structure. Here we directly probe the Fermi surface of UTe2 by measuring magnetic quantum oscillations in pristine quality crystals. We find an angular profile of quantum oscillatory frequency and amplitude that is characteristic of a quasi-2D Fermi surface, which we find is well described by two cylindrical Fermi sheets of electron- and hole-type respectively. Additionally, we find that both cylindrical Fermi sheets possess considerable undulation but negligible small-scale corrugation, which may allow for their near-nesting and therefore promote magnetic fluctuations that enhance the triplet pairing mechanism. Importantly, we find no evidence for the presence of any 3D Fermi surface sections. Our results place strong constraints on the possible symmetry of the superconducting order parameter in UTe2.

Suggested Citation

  • A. G. Eaton & T. I. Weinberger & N. J. M. Popiel & Z. Wu & A. J. Hickey & A. Cabala & J. Pospíšil & J. Prokleška & T. Haidamak & G. Bastien & P. Opletal & H. Sakai & Y. Haga & R. Nowell & S. M. Benjam, 2024. "Quasi-2D Fermi surface in the anomalous superconductor UTe2," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-023-44110-4
    DOI: 10.1038/s41467-023-44110-4
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    References listed on IDEAS

    as
    1. S. S. Saxena & P. Agarwal & K. Ahilan & F. M. Grosche & R. K. W. Haselwimmer & M. J. Steiner & E. Pugh & I. R. Walker & S. R. Julian & P. Monthoux & G. G. Lonzarich & A. Huxley & I. Sheikin & D. Brait, 2000. "Superconductivity on the border of itinerant-electron ferromagnetism in UGe2," Nature, Nature, vol. 406(6796), pages 587-592, August.
    2. Lin Jiao & Sean Howard & Sheng Ran & Zhenyu Wang & Jorge Olivares Rodriguez & Manfred Sigrist & Ziqiang Wang & Nicholas P. Butch & Vidya Madhavan, 2020. "Chiral superconductivity in heavy-fermion metal UTe2," Nature, Nature, vol. 579(7800), pages 523-527, March.
    3. P. Monthoux & D. Pines & G. G. Lonzarich, 2007. "Superconductivity without phonons," Nature, Nature, vol. 450(7173), pages 1177-1183, December.
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