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Observation of an antiferromagnetic quantum critical point in high-purity LaNiO3

Author

Listed:
  • Changjiang Liu

    (Argonne National Laboratory)

  • Vincent F. C. Humbert

    (University of Illinois at Urbana-Champaign)

  • Terence M. Bretz-Sullivan

    (Argonne National Laboratory)

  • Gensheng Wang

    (Argonne National Laboratory)

  • Deshun Hong

    (Argonne National Laboratory)

  • Friederike Wrobel

    (Argonne National Laboratory)

  • Jianjie Zhang

    (Argonne National Laboratory)

  • Jason D. Hoffman

    (Harvard University)

  • John E. Pearson

    (Argonne National Laboratory)

  • J. Samuel Jiang

    (Argonne National Laboratory)

  • Clarence Chang

    (Argonne National Laboratory)

  • Alexey Suslov

    (National High Magnetic Field Laboratory)

  • Nadya Mason

    (University of Illinois at Urbana-Champaign)

  • M. R. Norman

    (Argonne National Laboratory)

  • Anand Bhattacharya

    (Argonne National Laboratory)

Abstract

Amongst the rare-earth perovskite nickelates, LaNiO3 (LNO) is an exception. While the former have insulating and antiferromagnetic ground states, LNO remains metallic and non-magnetic down to the lowest temperatures. It is believed that LNO is a strange metal, on the verge of an antiferromagnetic instability. Our work suggests that LNO is a quantum critical metal, close to an antiferromagnetic quantum critical point (QCP). The QCP behavior in LNO is manifested in epitaxial thin films with unprecedented high purities. We find that the temperature and magnetic field dependences of the resistivity of LNO at low temperatures are consistent with scatterings of charge carriers from weak disorder and quantum fluctuations of an antiferromagnetic nature. Furthermore, we find that the introduction of a small concentration of magnetic impurities qualitatively changes the magnetotransport properties of LNO, resembling that found in some heavy-fermion Kondo lattice systems in the vicinity of an antiferromagnetic QCP.

Suggested Citation

  • Changjiang Liu & Vincent F. C. Humbert & Terence M. Bretz-Sullivan & Gensheng Wang & Deshun Hong & Friederike Wrobel & Jianjie Zhang & Jason D. Hoffman & John E. Pearson & J. Samuel Jiang & Clarence C, 2020. "Observation of an antiferromagnetic quantum critical point in high-purity LaNiO3," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-15143-w
    DOI: 10.1038/s41467-020-15143-w
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