Two-Dimensional Layered Oxide Structures Tailored by Self-Assembled Layer Stacking via Interfacial Strain.
Study of layered complex oxides emerge as one of leading topics in fundamental materials science because of the strong interplay among intrinsic charge, spin, orbital, and lattice. As a fundamental basis of heteroepitaxial thin film growth, interfacial strain can be used to design materials that exhibit new phenomena beyond their conventional forms. Here, we report a strain-driven self-assembly of bismuth-based supercell (SC) with a two-dimensional (2D) layered structure. With combined experimental analysis and first-principles calculations, we investigated the full SC structure and elucidated the fundamental growth mechanism achieved by the strain-enabled self-assembled atomic layer stacking. The unique SC structure exhibits room-temperature ferroelectricity, enhanced magnetic responses, and a distinct optical bandgap from the conventional double perovskite structure. This study reveals the important role of interfacial strain modulation and atomic rearrangement in self-assembling a layered singe-phase multiferroic thin film, which opens up a promising avenue in the search for and design of novel 2D layered complex oxides with enormous promise.
Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States.
Wenrui
W
Zhang
Department of Materials Science and Engineering and Department of Chemistry, University of North Texas , Denton, Texas 76203, United States.|International Research Center for Renewable Energy, State key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University , Xi'an, Shaanxi 710049, P. R. China.
Mingtao
M
Li
Department of Electrical and Computer Engineering, Texas A&M University , College Station, Texas 77843, United States.|Center for Integrated Nanotechnologies, MS K771, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States.
Aiping
A
Chen
Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States.
Leigang
L
Li
Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States.
Yuanyuan
Y
Zhu
Department of Materials Science and Engineering and Department of Chemistry, University of North Texas , Denton, Texas 76203, United States.
Zhenhai
Z
Xia
Sandia National Laboratories , Albuquerque, New Mexico 87185, United States.
Ping
P
Lu
Normandie Univ, ENSICAEN, UNICAEN, CNRS, CRISMAT, 6 Boulevard Maréchal Juin, F-14050 Caen Cedex 4, France.
Philippe
P
Boullay
Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory , Upton, New York 11973, United States.
Lijun
L
Wu
Condensed Matter Physics & Materials Science Department, Brookhaven National Laboratory , Upton, New York 11973, United States.
Yimei
Y
Zhu
Department of Materials Science, University of Cambridge , 27 Charles Babbage Rd., Cambridge, CB3 OFS, U.K.
Judith L
JL
MacManus-Driscoll
Center for Integrated Nanotechnologies, MS K771, Los Alamos National Laboratory , Los Alamos, New Mexico 87545, United States.
Quanxi
Q
Jia
Department of Materials Science and Engineering, NSF Center for Advanced Materials and Smart Structures, North Carolina State University , Raleigh, North Carolina 27695, United States.
Honghui
H
Zhou
Department of Materials Science and Engineering, NSF Center for Advanced Materials and Smart Structures, North Carolina State University , Raleigh, North Carolina 27695, United States.
Jagdish
J
Narayan
Department of Mechanical Engineering, Texas A&M University , College Station, Texas 77843, United States.
Xinghang
X
Zhang
Department of Materials Science and Engineering, Texas A&M University , College Station, Texas 77843, United States.|Department of Electrical and Computer Engineering, Texas A&M University , College Station, Texas 77843, United States.
Haiyan
H
Wang
interface; layered oxides; multiferroic; self-assembly; strain engineering