Lattice dynamics of the infinite-layer nickelate LaNiO${}_2$

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 co-aligned 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.

10 pages, 4 figures with supplemental materials

References in corpus (44)

• Mantid - Data Analysis and Visualization Package for Neutron Scattering and $\mu SR$ Experiments
• Implementation strategies in phonopy and phono3py
• Superconductivity in infinite-layer nickelate La${}_{1-x}$Ca${}_x$NiO${}_2$ thin films
• Late transition-metal oxides with infinite-layer structure: Nickelates versus cuprates
• Phase Diagram of Infinite Layer Praseodymium Nickelate Pr${}_{1-x}$Sr${}_x$NiO${}_2$ Thin Films
• Magnetic neutron scattering in hole doped cuprate superconductors
• Nickelate superconductors $--$ Multiorbital nature and spin freezing
• A Systematic Study of Electron-Phonon Coupling to Oxygen Modes Across the Cuprates
• Character of the "normal state" of the nickelate superconductors
• Charge density waves in infinite-layer NdNiO${}_2$ nickelates
• Charge and spin order dichotomy in NdNiO${}_2$ driven by SrTiO${}_3$ capping layer
• Orbital Selective Superconductivity in a Two-band Model of Infinite-Layer Nickelates
• Topotactic transformation of single-crystals: from perovskite to infinite-layer nickelates
• Photoemission kinks and phonons in cuprates
• Charge ordering in superconducting copper oxides
• Calculated Exchange Interactions and Sensitivity of Ni Two-Hole Spin State to Hund's Coupling in Doped NdNiO2
• Superconducting Instabilities in Strongly-Correlated Infinite-Layer Nickelates
• Phase diagram of nickelate superconductors calculated by dynamical vertex approximation
• Dynamical Mean Field Studies of Infinite Layer Nickelates: Physics Results and Methodological Implications
• Preparation of superconducting thin films of infinite-layer nickelate Nd${}_{0.8}$Sr${}_{0.2}$NiO${}_2$
• Cuprate-like Electronic Structures in Infinite-Layer Nickelates with Substantial Hole Dopings
• Optimizing superconductivity: from cuprates via nickelates to palladates
• Low-energy electrodynamics of infinite-layer nickelates: evidence for d-wave superconductivity in the dirty limit
• Doping dependence of electronic structure of infinite-layer NdNiO2
• Electronic Structure of Superconducting Infinite-Layer Lanthanum Nickelates
• Core-Level X-Ray Spectroscopy of Infinite-Layer Nickelate: LDA+DMFT Study
• The impact of dynamical screening on the phonon dynamics of LaCuO
• Experimental Evidence that Zn Impurities Pin Pair-Density-Wave Order in La${}_{2-x}$Ba${}_x$CuO${}_4$
• Synthesis and physical properties of LaNiO${}_2$ crystals
• Two-gap superconductivity and decisive role of rare-earth $d$ electrons in infinite-layer nickelates
• Superconductivity in PrNiO2 infinite-layer nickelates
• Preempted phonon-mediated superconductivity in the infinite-layer nickelates
• Effect of the electronic charge gap on LO bond-stretching phonons in undoped La${}_2$CuO${}_4$ calculated using LDA+U
• Dynamical structural instability and its implication on the physical properties of infinite-layer nickelates
• Topotactic-hydrogen forms chains in $AB$O${}_2$ nickelate superconductors
• Phase formation in hole- and electron-doped rare-earth nickelate single crystals
• Electronic Theory for Scanning Tunneling Microscopy Spectra in Infinite-Layer Nickelate Superconductors
• Structural instabilities of infinite-layer nickelates from first-principles simulations
• Investigation of spin excitations and charge order in bulk crystals of the infinite-layer nickelate LaNiO${}_2$
• Charge ordering as the driving mechanism for superconductivity in rare-earth nickel oxides
• Unusual Hole-doping-dependent Electronic Instability and Electron-Phonon Coupling in Infinite-layer Nickelates
• Observation of Coulomb blockade and Coulomb staircases in superconducting Pr0.8Sr0.2NiO2 films
• Pressure effects on the electronic structure and magnetic properties of infinite-layer nickelates
• Theoretical study on the possibility of high $T_c$ s$\pm$-wave superconductivity in the heavily hole-doped infinite layer nickelates