RIXS study of spin excitation and charge order in the bulk phase of infinite-layer nickelates

ORAL

Abstract

Infinite-layer (IL) nickelates are a new class of superconductors that exhibits both similarities and differences to cuprates. Earlier resonant inelastic x-ray scattering (RIXS) studies on thin-film IL nickelates reported spin excitations and charge ordering patterns reminiscent of those in cuprates [1]. However, recent electron microsopy investigations on thin films identified topotactic impurity phases [2], potentially accounting for the emergence of the observed phenomena. To provide a complementary sample type, we have synthesized bulk crystals of the IL nickelate LaNiO2 [3], and carried out RIXS experiments. In this talk, we will discuss the results of these experiments, clarifying the intrinsic spin and charge characteristics of the bulk phase of IL nickelates.

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Publication: [1] E. Benckiser, M. Hepting, and B. Keimer, Nat. Mater. 21, 1102 (2022).
[2] A. Raji et al., Small 19, 2304872 (2023) and C. Parzyck et al., arXiv:2307.06486 (2023).
[3] P. Puphal et al., Phys. Rev. Mater. 7, 014804 (2023).

Presenters

  • Shohei Hayashida

    • Max Planck Institute for Solid State Research

Authors

  • Shohei Hayashida

    • Max Planck Institute for Solid State Research

  • Vignesh Sundaramurthy

    • Max Planck Institute for Solid State Research

  • Pascal Puphal

    • Max Planck Institute for Solid State Research

  • Mirian Garcia-Fernandez

    • Diamond Light Source

  • Ke-Jin Zhou

    • Diamond Light Source

  • Masahiko Isobe

    • Max Planck Institute for Solid State Research
    • Max-Planck Institute for Solid State Research
    • Max Planck Institut für Festkörperforschung

  • Yu-Mi Wu

    • Max Planck Institute for Solid State Physics

  • Eren Suyolcu

    • Max Planck Institute for Solid State Research
    • Max Planck Institut für Festkörperforschung

  • Peter A. A van Aken

    • Max Planck Institute for Solid State Research
    • Max Planck Institute for Solid State Physics

  • Matteo Minola

    • Max Planck Institute for Solid State Research

  • Bernhard Keimer

    • Max Planck Institute for Solid State Physics
    • Max Planck Institute for Solid State Research

  • Matthias Hepting

    • Max Planck Institute for Solid State Research