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Atomic‐Scale Control of Electronic Structure and Ferromagnetic Insulating State in Perovskite Oxide Superlattices by Long‐Range Tuning of BO6 Octahedra

Li, Weiwei; Zhu, Bonan; Zhu, Ruixue; Wang, Qiang; Lu, Ping; Sun, Yuanwei; Cafolla, Clodomiro; Qi, Zhimin; Chen, Aiping; Gao, Peng; Wang, Haiyan; He, Qing; Zhang, Kelvin H.L.; MacManus‐Driscoll, Judith L.

Atomic‐Scale Control of Electronic Structure and Ferromagnetic Insulating State in Perovskite Oxide Superlattices by Long‐Range Tuning of BO6 Octahedra Thumbnail


Authors

Weiwei Li

Bonan Zhu

Ruixue Zhu

Qiang Wang

Ping Lu

Yuanwei Sun

Dr Miro Cafolla clodomiro.cafolla@durham.ac.uk
Addison Wheeler Research Fellow

Zhimin Qi

Aiping Chen

Peng Gao

Haiyan Wang

Kelvin H.L. Zhang

Judith L. MacManus‐Driscoll



Abstract

Control of BO6 octahedral rotations at the heterointerfaces of dissimilar ABO3 perovskites has emerged as a powerful route for engineering novel physical properties. However, its impact length scale is constrained at 2–6 unit cells close to the interface and the octahedral rotations relax quickly into bulk tilt angles away from interface. Here, a long‐range (up to 12 unit cells) suppression of MnO6 octahedral rotations in La0.9Ba0.1MnO3 through the formation of superlattices with SrTiO3 can be achieved. The suppressed MnO6 octahedral rotations strongly modify the magnetic and electronic properties of La0.9Ba0.1MnO3 and hence create a new ferromagnetic insulating state with enhanced Curie temperature of 235 K. The emergent properties in La0.9Ba0.1MnO3 arise from a preferential occupation of the out‐of‐plane Mn d 3z 2−r 2 orbital and a reduced Mn eg bandwidth, induced by the suppressed octahedral rotations. The realization of long‐range tuning of BO6 octahedra via superlattices can be applicable to other strongly correlated perovskites for exploring new emergent quantum phenomena.

Citation

Li, W., Zhu, B., Zhu, R., Wang, Q., Lu, P., Sun, Y., …MacManus‐Driscoll, J. L. (2020). Atomic‐Scale Control of Electronic Structure and Ferromagnetic Insulating State in Perovskite Oxide Superlattices by Long‐Range Tuning of BO6 Octahedra. Advanced Functional Materials, 30(40), Article 2001984. https://doi.org/10.1002/adfm.202001984

Journal Article Type Article
Online Publication Date Aug 2, 2020
Publication Date Oct 1, 2020
Deposit Date Aug 4, 2020
Publicly Available Date Mar 28, 2024
Journal Advanced Functional Materials
Print ISSN 1616-301X
Electronic ISSN 1616-3028
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 30
Issue 40
Article Number 2001984
DOI https://doi.org/10.1002/adfm.202001984

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Published Journal Article (Advance online version) (1.4 Mb)
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
Advance online version © 2020 The Authors. Published by Wiley‐VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.






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