Atomic‐Scale Control of Electronic Structure and Ferromagnetic Insulating State in Perovskite Oxide Superlattices by Long‐Range Tuning of BO6 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 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 d3z2−r2 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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 02, 2020
- Source ID
- 10.1002/adfm.202001984
Entities
People
- Aiping Chen
- Bonan Zhu
- Clodomiro Cafolla
- Haiyan Wang
- Judith L. Macmanus‐driscoll
- Kelvin H. L. Zhang
- Peng Gao
- Ping Lu
- Qiang Wang
- Qing He
- Ruixue Zhu
- Weiwei Li
- Yuanwei Sun
- Zhimin Qi
Organizations
- Cambridge Commonwealth European and International Trust
- China Scholarship Council
- Durham University
- Engineering and Physical Sciences Research Council
- Isaac Newton Trust
- Los Alamos National Laboratory
- National Natural Science Foundation of China
- National Nuclear Security Administration
- National Science Foundation
- Office of Science
- Peking University
- Program 973
- Purdue University
- Royal Academy of Engineering
- Sandia National Laboratories
- United States Department of Energy
- University of Cambridge
- West Virginia University
- Xiamen University