Optical probe of strong correlations in LaNiO${}_3$ thin films

Abstract

The optical properties of LaNiO${}_3$ thin films are investigated over a wide energy and temperature range. Thin films of varying thickness were epitaxially grown by pulsed laser deposition on LaAlO${}_3$ and SrTiO${}_3$ substrates. The optical conductivity data of the films reveal a number of interband transitions above 1 eV which are in good agreement with band structure calculations. No well defined Drude peak is observed however, in stark contrast with LDA theory predicting a finite density of states at the Fermi energy. This experimental finding of a vanishing Drude spectral weight, compared to a finite electron kinetic energy obtained from band structure calculations, highlights the importance of strong electronic correlations in LaNiO${}_3$.

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Cited by in corpus (9)

• Covalency in transition metal oxides within all-electron Dynamical Mean Field Theory
• Structural origins of the properties of rare earth nickelate superlattices
• Quantifying electronic correlation strength in a complex oxide: a combined DMFT and ARPES study of LaNiO${}_3$
• Lazy skip lists, a new algorithm for fast hybridization-expansion quantum Monte Carlo
• Strain mediated suppression of the metal-insulator transition in EuNiO3 thin films
• Strain Control of Electronic Phase in Rare Earth Nickelates
• Hallmark of strong electronic correlations in LaNiO${}_3$: photoemission kink and broadening of fully occupied bands
• Epitaxial Stabilization of Ultrathin Films of Rare-Earth Nickelates
• Breathing distortions in the metallic, antiferromagnetic phase of LaNiO${}_3$