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Investigation of spin excitations and charge order in bulk crystals of the infinite-layer nickelate LaNiO 2

DOI: 10.1103/PhysRevB.109.235106 DOI Help

Authors: S. Hayashida (Max-Planck-Institute for Solid State Research) , V. Sundaramurthy (Max-Planck-Institute for Solid State Research) , P. Puphal (Max-Planck-Institute for Solid State Research) , M. Garcia-Fernandez (Diamond Light Source) , K.-J. Zhou (Diamond Light Source) , B. Fenk (Max-Planck-Institute for Solid State Research) , M. Isobe (Max-Planck-Institute for Solid State Research) , M. Minola (Max-Planck-Institute for Solid State Research) , Y.-M. Wu (Max-Planck-Institute for Solid State Research) , Y. E. Suyolcu (Max-Planck-Institute for Solid State Research) , P. A. Van Aken (Max-Planck-Institute for Solid State Research) , B. Keimer (Max-Planck-Institute for Solid State Research) , M. Hepting (Max-Planck-Institute for Solid State Research)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 109

State: Published (Approved)
Published: June 2024
Diamond Proposal Number(s): 33241

Open Access Open Access

Abstract: Recent x-ray spectroscopic studies have revealed spin excitations and charge density waves in thin films of infinite-layer (IL) nickelates. However, clarifying whether the origin of these phenomena is intrinsic to the material class or attributable to impurity phases in the films has presented a major challenge. Here we utilize topotactic methods to synthesize bulk crystals of the IL nickelate LaNiO2 with crystallographically oriented surfaces. We examine these crystals using resonant inelastic x-ray scattering (RIXS) at the Ni 𝐿3-edge to elucidate the spin and charge correlations in the bulk of the material. While we detect the presence of prominent spin excitations in the crystals, fingerprints of charge order are absent at the ordering vectors identified in previous thin-film studies. These results contribute to the understanding of the bulk properties of LaNiO2 and establish topotactically synthesized crystals as viable complementary specimens for spectroscopic investigations.

Journal Keywords: Charge density waves; Electronic structure; Magnetic interactions; Superconductivity; Nickelates; Single crystal materials; Strongly correlated systems; Electron microscopy; Resonant inelastic x-ray scattering

Subject Areas: Materials, Physics

Instruments: I21-Resonant Inelastic X-ray Scattering (RIXS)

Added On: 07/06/2024 08:31


Discipline Tags:

Surfaces Superconductors Quantum Materials Hard condensed matter - electronic properties Physics Hard condensed matter - structures Materials Science interfaces and thin films

Technical Tags:

Scattering Resonant Inelastic X-ray Scattering (RIXS)