Title: Atomic‐Scale Control of Electronic Structure and Ferromagnetic Insulating State in Perovskite Oxide Superlattices by Long‐Range Tuning of BO ₆ Octahedra

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 La_0.9Ba_0.1MnO₃ through the formation of superlattices with SrTiO₃ can be achieved. The suppressed MnO₆ octahedral rotations strongly modify the magnetic and electronic properties of La_0.9Ba_0.1MnO₃ and hence create a new ferromagnetic insulating state with enhanced Curie temperature of 235 K. The emergent properties in La_0.9Ba_0.1MnO₃ arise from a preferential occupation of the out-of-plane Mn d_3z²_–r² orbital and a reduced Mn e_g 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.

Authors:

Li, Weiwei  ^[1];

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Zhu, Bonan ^[1]; Zhu, Ruixue ^[2]; Wang, Qiang ^[3]; Lu, Ping ^[4]; Sun, Yuanwei ^[2]; Cafolla, Clodomiro ^[5]; Qi, Zhimin ^[6]; Chen, Aiping ^[7]; Gao, Peng ^[8]; Wang, Haiyan ^[6]; He, Qing ^[5]; Zhang, Kelvin H. L. ^[9]; MacManus‐Driscoll, Judith L. ^[1]

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+ Show Author Affiliations

1. Department of Materials Science and Metallurgy University of Cambridge 27 Charles Babbage Road Cambridge CB3 0FS UK
2. International Centre for Quantum Materials and Electron Microscopy Laboratory School of Physics Peking University Beijing 100871 China
3. Department of Physics and Astronomy West Virginia University Morgantown WA 26506 USA
4. Sandia National Laboratories Albuquerque NM 87185 USA
5. Department of Physics Durham University Durham DH1 3LE UK
6. School of Materials Engineering Purdue University West Lafayette IN 47907 USA
7. Center for Integrated Nanotechnologies Los Alamos National Laboratory Los Alamos NM 87545 USA
8. International Centre for Quantum Materials and Electron Microscopy Laboratory School of Physics Peking University Beijing 100871 China, Collaborative Innovation Center for Quantum Matter Beijing 100871 China
9. State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 China

Publication Date:

Sun Aug 02 00:00:00 EDT 2020

Research Org.:

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:

USDOE National Nuclear Security Administration (NNSA); US Department of the Navy, Office of Naval Research (ONR); National Science Foundation (NSF); Engineering and Physical Sciences Research Council (EPSRC); National Natural Science Foundation of China (NSFC); National Key Research and Development Program of China; Key Area R&D Program of Guangdong Province; National Equipment Program of China; USDOE Laboratory Directed Research and Development (LDRD) Program

OSTI Identifier:

1644348

Alternate Identifier(s):

OSTI ID: 1644350; OSTI ID: 1670191; OSTI ID: 1699472

Report Number(s):

SAND-2020-6632J; LA-UR-20-28256
Journal ID: ISSN 1616-301X; 2001984

Grant/Contract Number:  

AC04-94AL85000; 89233218CNA000001; NA0003525; N00014-16-1-2465; DMR-1565822; EP/L011700/1; EP/N004272/1; 21872116; 51672007; 11974023; 2016YFA0300804; 2018B010109009; 2018B030327001; ZDYZ2015-1

Resource Type:

Published Article

Journal Name:

Advanced Functional Materials

Additional Journal Information:

Journal Name: Advanced Functional Materials Journal Volume: 30 Journal Issue: 40; Journal ID: ISSN 1616-301X

Publisher:

Wiley

Country of Publication:

Germany

Language:

English

Subject:

36 MATERIALS SCIENCE; Material Science