Lateral strain tailoring in manganite homostructures assisted by atomic-flat freestanding membranes  

作　　者：Yufei Wang Yuchen Zhu Shengru Chen Dongke Rong Qiao Jin Er-Jia Guo 

机构地区：[1]College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China [2]State Key Laboratory for Advanced Metals and Materials,University of Science and Technology Beijing,Beijing 100083,China [3]Beijing National Laboratory for Condensed Matter Physics and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [4]Department of Physics&Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Nano Research》2023年第5期7829-7836,共8页纳米研究（英文版）

基　　金：the National Key Basic Research Program of China(No.2020YFA0309100);the National Natural Science Foundation of China(Nos.51971025,12034002,11974390,U22A20263,and 52250308);the Beijing Natural Science Foundation(No.2212034);the Guangdong-Hong Kong-Macao Joint Laboratory for Neutron Scattering Science and Technology(No.HT-CSNS-DG-CD-0080/2021);the Strategic Priority Research Program(B)of the Chinese Academy of Sciences(No.XDB33030200).

摘　　要：Complex oxide thin films exhibit intriguing phenomena due to the coupling between multiple degrees of freedom through interfacial structural engineering.Atomic tailoring of structural parameters determines unique band structure and phonon modes,regulating emergent magnetic and electrical properties of oxide films.However,the construction of different strained and oriented domains in one intact oxide thin film is impossible using conventional means.Here we report the fabrication and quantitative structural analysis of La_(0.7)Sr_(0.3)MnO_(3)(LSMO)homostructures assisted by atomic-flat freestanding membranes.Pristine substrates and suspended membranes regulate the epitaxial strain and orientation of subsequently grown films.Our results demonstrate an ultrathin transition layer(~4 atomic layers)between freestanding membranes and LSMO films is formed due to the strain relaxation.This work offers a simple and scalable methodology for fabricating unprecedented innovative functional oxide homostructures through artificially controlled synthesis routes.

关 键 词：transmission electron microscopy oxide homostructure freestanding membranes MANGANITES strain engineering 

分 类 号：O48[理学—固体物理]