Lattice dynamics of the infinite-layer nickelate LaNiO 2
Year: 2025
Type: article
Abstract: Infinite-layer (IL) nickelates have rapidly emerged as a new class of superconductors. However, due to the technical challenges of their topotactic synthesis, they have so far been realized primarily as thin films or polycrystalline powder samples, limiting comprehensive investigations of fundamental physical properties such as the lattice dynamics. Here, we present a time-of-flight inelastic neutron scattering study on a sample composed of a large number of coaligned bulk crystals of the IL nickelate LaNiO 2 . We observe several dispersive phonon branches, which are in good agreement with lattice dynamical calculations based on density-functional perturbation theory. In addition, we compare the characteristics of selected LaNiO 2 phonon modes to those of isostructural cuprate superconductors. Our findings provide a reference point for future experimental and theoretical efforts aimed at understanding the interplay between lattice dynamics and electronic properties in IL nickelates.
DOI: 10.1103/rk6x-2f3r
Institutions: Max Planck Institute for Solid State Research, Comprehensive Research Organization for Science and Society, CROSS Neutron Science and Technology Center, University of Science and Technology of China, Chinese Academy of Sciences, Institute of Solid State Physics, Heinz Maier-Leibnitz Zentrum, Institut Laue-Langevin, TU Wien, Northwest University
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4415830511