Superconductivity in Ruddlesden-Popper nickel oxides

ORAL

Abstract

In 2023, superconductivity was, for the first time, observed in bulk Ruddlesden-Popper nickelates, in a compressed lanthanum-bearing nickel oxide. Different La-containing nickelate stoichiometries were soon after shown to also superconduct, followed by multiple reports of superconductivity in Pr4Ni3O10 under static pressure. However, this critical phenomenon remains to be explored in nickel alloys grown with elements further down the lanthanide series. The decrease of ionic radius as a function of increasing Z in lanthanides presents another way of tuning the lattice, which could correlate with the pressure threshold needed to drive Ruddlesden-Popper nickelates into a bulk superconducting state.

*This work was supported by the Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Science and Engineering Division; by the U.S. National Science Foundation [grant DMR-2104881]; and by DOE-NNSA [cooperative agreement DE-NA0004153] (Chicago / DOE Alliance Center).

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Publication: X. Chen, E.H.T. Poldi, S. Huyan, R. Chapai, H. Zheng, S.L. Bud'ko, U. Welp, P.C. Canfield, R.J. Hemley, J.F. Mitchell and D. Phelan. "Low fractional volume superconductivity in Pr4Ni3O10 single crystals under pressure". Phys. Rev. B. 111, 094525 (2025).

Presenters

  • Eduardo Poldi

    • University of Illinois at Chicago

Authors

  • Eduardo Poldi

    • University of Illinois at Chicago

  • Xinglong Chen

    • Argonne National Laboratory

  • Hong Zheng

    • Argonne National Laboratory

  • Ulrich Welp

    • Argonne National Laboratory

  • Russell J Hemley

    • University of Illinois at Chicago

  • John F Mitchell

    • Argonne National Laboratory

  • Daniel Phelan

    • Argonne National Laboratory
    • Materials Science Division, Argonne National Laboratory, Lemont, IL 60439, USA