Spin stripe order in a square planar trilayer nickelate

ORAL

Abstract


Highly orbitally polarized trilayer nickelates represent a potential platform for searching for high-TC superconductivity. La4Ni3O8 undergoes a semiconductor-insulator transition on cooling at TSI ~ 105 K, which is accompanied by formation of charge stripes. Here we report polarized and unpolarized neutron diffraction measurements which show that the magnetic ground state consists of antiferromagnetic spin stripes that are commensurate with the charge stripes. The magnetic stripes are modeled as occurring within uncorrelated trilayers. Comparison of the charge and spin stripe order parameters reveals that, in contrast to single-layer nickelates and most transition metal oxides, the orders both appear at TSI, suggesting a strong coupling between the two.

*This work was supported by the U.S. Deparment of Energy, Office of Science, Basic Energy Sciences, Materials Science and Engineering Division.

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Presenters

  • Daniel Phelan

    • MSD, Argonne National Laboratory
    • Materials Science Division, Argonne National Laboratory

Authors

  • Daniel Phelan

    • MSD, Argonne National Laboratory
    • Materials Science Division, Argonne National Laboratory

  • Junjie Zhang

    • MSD, Argonne National Laboratory
    • Argonne National Laboratory

  • Daniel Pajerowski

    • Quantum Condensed Matter Division, Oak Ridge National Lab
    • NSD, Oak Ridge National Laboratory
    • Oak Ridge National Lab
    • Neutron Scattering Division, Oak Ridge National Laboratory

  • Antia Botana

    • MSD, Argonne National Laboratory
    • Argonne National Laboratory
    • Materials Science Division, Argonne National Laboratory

  • Leland Harriger

    • NIST Center for Neutron Research
    • NCNR, NIST
    • National Institute of Standards and Technology
    • NIST Center for Neutron Research, National Institute of Standards and Technology
    • NIST center for Neutron Scattering

  • Jose Rodriguez

    • NIST
    • NIST Center for Neutron research
    • NCNR, NIST
    • NIST NCNR
    • NIST Center for Neutron Research

  • Yu-Sheng Chen

    • ChemMatCARS, The University of Chicago
    • Argonne National Laboratory
    • ChemMatCARS/The University of Chicago
    • Center for Advanced Radiation Sources, University of Chicago

  • Michael Norman

    • MSD, Argonne National Laboratory
    • Materials Science Division, Argonne National Laboratory
    • Materials Science Division, Argonne Natl Lab

  • Stephan Rosenkranz

    • Argonne Natl Lab
    • Materials Science Division, Argonne National Laboratory
    • MSD, Argonne National Laboratory
    • Argonne Nat'l Lab

  • John Mitchell

    • Argonne Natl Lab
    • Materials Science Division, Argonne National Laboratory
    • MSD, Argonne National Laboratory
    • Argonne National Laboratory