Hard x-ray photoemission study on strain effect in LaNiO${}_3$ thin films

Abstract

The strain effect from a substrate is an important experimental route to control electronic and magnetic properties in transition-metal oxide (TMO) thin films. Using hard x-ray photoemission spectroscopy, we investigate the strain dependence of the valence states in LaNiO${}_3$ thin films, strongly correlated perovskite TMO, grown on four substrates: LaAlO${}_3$, (LaAlO${}_3$)${}_{0.3}$(SrAl${}_{0.5}$Ta${}_{0.5}$O${}_3$)${}_{0.7}$, SrTiO${}_3$, and DyScO${}_3$. A Madelung potential analysis of core-level spectra suggests that the point-charge description is valid for the La ions while it breaks down for Ni and O ions due to a strong covalent bonding between the two. A clear x-ray photon-energy dependence of the valence spectra is analyzed by the density functional theory, which points to a presence of the La 5$p$ state near the Fermi level.

arXiv comment6 pages, 4 figures, and 2 tables

References in corpus (25)

• Enhanced bifunctional oxygen catalysis in strained LaNiO3 perovskites
• Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices
• Dimensionality Control of Electronic Phase Transitions in Nickel-Oxide Superlattices
• Metal-insulator transition in ultrathin LaNiO3 films
• Site-selective Mott transition in rare earth nickelates
• Physics of ultrathin films and heterostructures of rare earth nickelates
• Turning a nickelate Fermi surface into a cuprate-like one through heterostructuring
• Orbital-Selective Mott transition out of band degeneracy lifting
• Charge disproportionation without charge transfer in the rare-earth nickelates as a possible mechanism for the metal-insulator transition
• Asymmetric orbital-lattice interactions in ultra-thin correlated oxide films
• Low-energy description of the metal-insulator transition in the rare-earth nickelates
• Quantum confinement of Mott electrons in ultrathin LaNiO3/LaAlO3 superlattice
• Hole-doping-induced changes in the electronic structure of La${}_{1-x}$Sr${}_x$FeO${}_3$ : soft x-ray photoemission and absorption study of epitaxial thin films
• Orbital control of noncollinear magnetic order in nickelate heterostructures
• Landau theory of charge and spin ordering in the nickelates
• Theory of the magnetic and metal-insulator transitions in RNiO3 bulk and layered structures
• Metal-insulator transition in a two-band model for the perovskite nickelates
• Fermi surfaces, electron-hole asymmetry and correlation kink in a three-dimensional Fermi liquid LaNiO${}_3$
• Electronic structure of nickelates: From two-dimensional heterostructures to three-dimensional bulk materials
• Prominent 5d-orbital contribution to the conduction electrons in gold
• Evidence for mass renormalization in LaNiO$"" sub 3_: an in situ soft x-ray photoemission study of epitaxial films
• Latent Instabilities in Metallic LaNiO3 Films by Strain Control of Fermi-Surface Topology
• Strain-controlled band engineering and self-doping in ultrathin LaNiO${}_3$ films
• Bulk and surface electronic properties of SmB6: a hard x-ray photoelectron spectroscopy study
• Madelung potentials and covalency effect in strained La${}_{1-x}$Sr${}_x$MnO${}_3$ thin films studied by core-level photoemission spectroscopy

Cited by in corpus (1)

• Valency, charge-transfer, and orbital-dependent correlation in bilayer nickelates Nd3Ni2O7