Top-Layer Engineering Reshapes Charge Transfer at Polar Oxide Interfaces.

De Luca, Gabriele; Spring, Jonathan; Kaviani, Moloud; Jöhr, Simon; Campanini, Marco; Zakharova, Anna; Guillemard, Charles; Herrero-Martin, Javier; Erni, Rolf; Piamonteze, Cinthia; Rossell, Marta D; Aschauer, Ulrich; Gibert, Marta (2022). Top-Layer Engineering Reshapes Charge Transfer at Polar Oxide Interfaces. Advanced materials, 34(36), e2203071. Wiley-VCH 10.1002/adma.202203071

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Charge-transfer phenomena at heterointerfaces are a promising pathway to engineer functionalities absent in the bulk material but can also lead to degraded properties in the ultrathin films. Mitigating such undesired effects with an interlayer reshapes the interface architecture, restricting its operability. Therefore, developing less-invasive methods to control the charge transfer would be beneficial. Here, an appropriate top-interface design allows for remotely manipulating the charge configuration of the buried interface and concurrently restoring the ferromagnetic trait of the whole film. Double-perovskite insulating ferromagnetic La2 NiMnO6 (LNMO) thin films grown on perovskite oxide substrates are investigated as a model system. An oxygen-vacancy-assisted electronic reconstruction takes place initially at the LNMO polar interfaces. As a result, the magnetic properties of 2-5 unit cells LNMO films are affected beyond dimensionality effects. The introduction of a top electron-acceptor layer redistributes the electron excess and restores the ferromagnetic properties of the ultrathin LNMO films. Such a strategy can be extended to other interfaces and provides an advanced approach to fine tune the electronic features of complex multi-layered heterostructures. This article is protected by copyright. All rights reserved.

Item Type:

Journal Article (Original Article)


08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP)

UniBE Contributor:

Kaviani Baghbadorani, Moloud, Aschauer, Ulrich Johannes


500 Science > 570 Life sciences; biology
500 Science > 540 Chemistry
000 Computer science, knowledge & systems








Pubmed Import

Date Deposited:

19 Jul 2022 12:02

Last Modified:

05 Dec 2022 16:21

Publisher DOI:


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Uncontrolled Keywords:

charge-transfer phenomena double perovskites ferromagnetism oxide interfaces




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