Multiple strain-induced phase transitions in LaNiO3 thin films

Abstract

Strain effects on epitaxial thin films of LaNiO3 grown on different single crystalline substrates are studied by Raman scattering and first-principles simulation. New Raman modes, not present in bulk or fully-relaxed films, appear under both compressive and tensile strains, indicating symmetry reductions. Interestingly, the Raman spectra and the underlying crystal symmetry for tensile and compressively strained films are different. Extensive mapping of LaNiO3 phase stability is addressed by simulations, showing that a variety of crystalline phases are indeed stabilized under strain which may impact the electronic orbital hierarchy. The calculated Raman frequencies reproduce the principal features of the experimental spectra, supporting the validity of the multiple strain-driven structural transitions predicted by the simulations.

18 pages, 7 figures

References in corpus (6)

• Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices
• Raman scattering investigation across the magnetic and MI transition in rare earth nickelate RNiO3 (R = Sm, Nd) thin films
• Phonon Raman scattering of perovskite LaNiO3 thin 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
• X-ray interference effects on the determination of structural data in ultrathin La2/3Sr1/3MnO3 epitaxial thin films

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• Untwinned YBa${}_2$Cu${}_3$O${}_{7-\delta }$ thin films on MgO substrates: a platform to study strain effects on the local orders in cuprates
• Patterning enhanced tetragonality in BiFeO3 thin films with effective negative pressure by helium implantation