Competing misfit relaxation mechanisms in epitaxial correlated oxides

Abstract

Strain engineering of functional properties in epitaxial thin films of strongly correlated oxides exhibiting octahedral-framework structures is hindered by the lack of adequate misfit relaxation models. Here we present unreported experimental evidences of a four-stage hierarchical development of octahedral-framework perturbations resulting from a progressive imbalance between electronic, elastic and octahedral tilting energies in La0.7Sr0.3MnO3 epitaxial thin films grown on SrTiO3 substrates. Electronic softening of the Mn - O bonds near the substrate leads to the formation of an interfacial layer clamped to the substrate with strongly degraded magnetotransport properties, i.e. the so-called dead layer, while rigid octahedral tilts become relevant at advanced growth stages without significant effects on charge transport and magnetic ordering.

References in corpus (8)

• Evidence of orbital reconstruction at interfaces in La0.67Sr0.33MnO3 films
• Surface electronic Structure and magnetic properties of doped manganites
• Tuning the atomic and domain structure of epitaxial films of multiferroic BiFeO3
• Epitaxial TbMnO3 thin films on SrTiO3 substrates: A structural study
• Structural phases of strained LaAlO3 driven by octahedral tilt instabilities
• Understanding interface effects in perovskite thin films
• Electronic Phase Separation in Manganite/Insulator Interfaces
• Local tetragonal distortion in La_{0.7}Sr_{0.3}MnO_3 strained thin films probed by x-ray absorption spectroscopy

Cited by in corpus (13)

• Negative Poisson's Ratio in 1T-Type Crystalline Two-Dimensional Transition Metal Dichalcogenides
• Tuning Perpendicular Magnetic Anisotropy by Oxygen Octahedral Rotations in (La${}_{1-x}$Sr${}_x$MnO${}_3$)/(SrIrO${}_3$) Superlattices
• Thickness dependent properties in oxide heterostructures driven by structurally induced metal-oxygen hybridization variations
• Effect of symmetry mismatch on the domain structure of rhombohedral BiFeO3 thin films
• Moiré Engineering of Electronic Phenomena in Correlated Oxides
• The origin of the dead-layer at the La0.67Sr0.33MnO3/SrTiO3 interface and dead-layer reduction via interfacial engineering
• Thickness-dependent ferromagnetic metal to paramagnetic insulator transition in La${}_{0.6}$Sr${}_{0.4}$MnO${}_3$ thin films studied by x-ray magnetic circular dichroism
• Thermodynamic conditions during growth determine the magnetic anisotropy in epitaxial thin-films of La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$
• Spin-orbit effects surfacing on manganites
• Octahedral coupling in (111)- and (001)-oriented La${}_{2/3}$Sr${}_{1/3}$MnO${}_3$/SrTiO${}_3$ heterostructures
• Unusual Electrical Conductivity Driven by Localized Stoichiometry Modification at Vertical Epitaxial Interfaces
• Charge ordering at the interface in (LaMnO${}_3$)${}_{2n}$/(SrMnO${}_3$)${}_n$ superlattices as the origin of their insulating state
• Termination control of magnetic coupling at a complex oxide interface