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

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 Chang, Alexey Suslov, Nadya Mason, M. R. Norman, Anand Bhattacharya

Research output: Contribution to journalArticle

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.

Original languageEnglish (US)
Article number1402
JournalNature communications
Volume11
Issue number1
DOIs
StatePublished - Dec 1 2020

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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    Liu, C., Humbert, V. F. C., Bretz-Sullivan, T. M., Wang, G., Hong, D., Wrobel, F., Zhang, J., Hoffman, J. D., Pearson, J. E., Jiang, J. S., Chang, C., Suslov, A., Mason, N., Norman, M. R., & Bhattacharya, A. (2020). Observation of an antiferromagnetic quantum critical point in high-purity LaNiO3 Nature communications, 11(1), [1402]. https://doi.org/10.1038/s41467-020-15143-w