Interfacial charge transfer and its impact on transport properties of LaNiO₃/LaFeO₃ superlattices.

ABSTRACT: Charge transfer or redistribution at oxide heterointerfaces is a critical phenomenon, often leading to remarkable properties such as two-dimensional electron gas and interfacial ferromagnetism. Despite studies on LaNiO₃/LaFeO₃ superlattices and heterostructures, the direction and magnitude of the charge transfer remain debated, with some suggesting no charge transfer due to the high stability of Fe³⁺ (3d⁵). Here, we synthesized a series of epitaxial LaNiO₃/LaFeO₃ superlattices and demonstrated partial (up to ~0.5 e^-/interface unit cell) charge transfer from Fe to Ni near the interface, supported by density functional theory simulations and spectroscopic evidence of changes in Ni and Fe oxidation states. The electr

SUBMITTER: Wang L 

PROVIDER: S-EPMC11654693 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature