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Superconductivity on the border of itinerant-electron ferromagnetism in UGe2

Author

Listed:
  • S. S. Saxena

    (University of Cambridge
    Materials Science Centre, University of Groningen
    University College London)

  • P. Agarwal

    (University of Cambridge)

  • K. Ahilan

    (University of Cambridge)

  • F. M. Grosche

    (University of Cambridge
    MPI Chemische Physik fester Stoffe)

  • R. K. W. Haselwimmer

    (University of Cambridge)

  • M. J. Steiner

    (University of Cambridge)

  • E. Pugh

    (University of Cambridge)

  • I. R. Walker

    (University of Cambridge)

  • S. R. Julian

    (University of Cambridge)

  • P. Monthoux

    (University of Cambridge)

  • G. G. Lonzarich

    (University of Cambridge)

  • A. Huxley

    (CEA Grenoble)

  • I. Sheikin

    (CEA Grenoble)

  • D. Braithwaite

    (CEA Grenoble)

  • J. Flouquet

    (CEA Grenoble)

Abstract

The absence of simple examples of superconductivity adjoining itinerant-electron ferromagnetism in the phase diagram has for many years cast doubt on the validity of conventional models of magnetically mediated superconductivity. On closer examination, however, very few systems have been studied in the extreme conditions of purity, proximity to the ferromagnetic state and very low temperatures required to test the theory definitively. Here we report the observation of superconductivity on the border of ferromagnetism in a pure system, UGe 2, which is known to be qualitatively similar to the classic d-electron ferromagnets. The superconductivity that we observe below 1 K, in a limited pressure range on the border of ferromagnetism, seems to arise from the same electrons that produce band magnetism. In this case, superconductivity is most naturally understood in terms of magnetic as opposed to lattice interactions, and by a spin-triplet rather than the spin-singlet pairing normally associated with nearly antiferromagnetic metals.

Suggested Citation

  • 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.
    • Handle: RePEc:nat:nature:v:406:y:2000:i:6796:d:10.1038_35020500
    DOI: 10.1038/35020500
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    Cited by:

    1. Kapcia, Konrad Jerzy & Murawski, Szymon & Kłobus, Waldemar & Robaszkiewicz, Stanisław, 2015. "Magnetic orderings and phase separations in a simple model of insulating systems," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 437(C), pages 218-234.
    2. P. T. Yang & Z. Y. Liu & K. Y. Chen & X. L. Liu & X. Zhang & Z. H. Yu & H. Zhang & J. P. Sun & Y. Uwatoko & X. L. Dong & K. Jiang & J. P. Hu & Y. F. Guo & B. S. Wang & J.-G. Cheng, 2022. "Pressured-induced superconducting phase with large upper critical field and concomitant enhancement of antiferromagnetic transition in EuTe2," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    3. 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.
    4. Riseborough, Peter S., 2005. "The de Haas–van Alphen effect at a quantum critical point," Energy, Elsevier, vol. 30(6), pages 885-895.

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