Thickness dependent properties in oxide heterostructures driven by structurally induced metal-oxygen hybridization variations

Abstract

Thickness driven electronic phase transitions are broadly observed in different types of functional perovskite heterostructures. However, uncertainty remains whether these effects are solely due to spatial confinement, broken symmetry or rather to a change of structure with varying film thickness. Here, we present direct evidence for the relaxation of oxygen 2p and Mn 3d orbital (p-d) hybridization coupled to the layer dependent octahedral tilts within a La2/3Sr1/3MnO3 film driven by interfacial octahedral coupling. An enhanced Curie temperature is achieved by reducing the octahedral tilting via interface structure engineering. Atomically resolved lattice, electronic and magnetic structures together with X-ray absorption spectroscopy demonstrate the central role of thickness dependent p-d hybridization in the widely observed dimensionality effects present in correlated oxide heterostructures.

Accepted by Adv. Funct. Mater

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Cited by in corpus (7)

• Orbital hybridization-driven charge density wave transition in CsV3Sb5 kagome superconductor
• Confinement of magnetism in atomically-thin $L{a}_{0.7}S{r}_{0.3}Cr{O}_3$/$L{a}_{0.7}S{r}_{0.3}Mn{O}_3$ heterostructures
• Magnetic Dead Layers in La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$ Revisited
• Two-dimensional electron systems in ATiO3 perovskites (A = Ca, Ba, Sr): control of orbital hybridization and order
• Control of magnetic anisotropy by orbital hybridization in (La0.67Sr0.33MnO3)n/(SrTiO3)n superlattice
• Dynamic control of octahedral rotation in perovskites by defect engineering
• Temperature dependent spin dynamics in La${}_{0.67}$Sr${}_{0.33}$MnO${}_3$/Pt bilayers