Strain mediated suppression of the metal-insulator transition in EuNiO3 thin films

Abstract

Ultrathin epitaxial films of EuNiO3 were grown on a series of substrates traversing highly compressive (- 2.4%) to highly tensile (2.5%) lattice mismatch. X-ray diffraction measurements showed the expected c-lattice parameter shift for compressive strain, but no detectable shift for tensilely strained substrates, while reciprocal space mapping confirmed the tensile strained film maintained epitaxial coherence. Transport measurements showed a successively (from tensile to compressive) lower resistance and a complete suppression of the metalinsulator transition at highly compressive lattice mismatch. Corroborating these findings, X-ray absorption spectroscopy measurements revealed a strong multiplet splitting in the tensile samples that progressively weakens with increasing compressive strain that, combined with cluster calculations, showed enhanced covalence between Ni-d and O-p orbitals leads to the metallic state.

References in corpus (7)

• Orbital order and possible superconductivity in LaNiO3/LaMO3 superlattices
• Site-selective Mott transition in rare earth nickelates
• Structural, electronic and magnetic properties of SrRuO${}_3$ under epitaxial strain
• Strain-induced insulator state in La_0.7Sr_0.3CoO_3
• Epitaxial growth of (111)-oriented LaAlO${}_3$/LaNiO${}_3$ ultra-thin superlattices
• Metal-insulator transition and orbital reconstruction in Mott quantum wells of NdNiO${}_3$
• Field-effect diode based on electron-induced Mott transition in NdNiO3

Cited by in corpus (11)

• Physics of ultrathin films and heterostructures of rare earth nickelates
• Bond disproportionation and dynamical charge fluctuations in the perovskite rare earth nickelates
• Mott Electrons in an Artificial Graphenelike Crystal of Rare-Earth Nickelate
• Possible strain induced Mott gap collapse in 1T-TaS${}_2$
• Strain-Driven Disproportionation at a Correlated Oxide Metal-Insulator Transition
• Disentangled cooperative orderings in artificial rare-earth nickelates
• Orbital engineering in nickelate heterostructures driven by anisotropic oxygen hybridization rather than orbital energy levels
• Selective Interface Control of Order Parameters in Complex Oxides
• Epitaxial strain modulated electronic properties of interface controlled nickelate superlattice
• Nucleation and growth bottleneck in the conductivity recovery dynamics of nickelate thin films
• PERSPECTIVE: Emergent phases in rare earth nickelate heterostructures