Phonon Raman scattering of perovskite LaNiO3 thin films

Abstract

We report an investigation of perovskite-type LaNiO3 thin films by Raman scattering in both various scattering configurations and as a function of temperature. The room-temperature Raman spectra and the associated phonon mode assignment provide reference data for phonon calculations and for the use of Raman scattering for structural investigations of LaNiO3, namely the effect of strain in thin films or heterostructures. The temperature-dependent Raman spectra from 80 to 900 K are characterized by the softening of the rotational A1g mode, which suggest a decreasing rhombohedral distortion towards the ideal cubic structure with increasing temperature.

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• Lattice normal modes and electronic properties of the correlated metal LaNiO${}_3$
• Topotactic transformation of single-crystals: from perovskite to infinite-layer nickelates
• Electronic structure of nickelates: From two-dimensional heterostructures to three-dimensional bulk materials
• Multiple strain-induced phase transitions in LaNiO3 thin films
• Strain analysis of multiferroic BiFeO3-CoFe2O4 nanostructures by Raman scattering
• Raman scattering of perovskite SmScO3 and NdScO3 single crystals
• SmNiO3/NdNiO3 thin film multilayers