Electronically phase separated nano-network in antiferromagnetic insulating LaMnO3/PrMnO3/CaMnO3 tricolor superlattice

Strongly correlated materials often exhibit an electronic phase separation (EPS) phenomena whose domain pattern is random in nature. The ability to control the spatial arrangement of the electronic phases at microscopic scales is highly desirable for tailoring their macroscopic properties and/or des...

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Published inarXiv.org
Main Authors Li, Qiang, Tian Miao, Zhang, Huimin, Lin, Weiyan, He, Wenhao, Yang, Zhong, Xiang, Lifen, Deng, Lina, Ye, Biying, Shi, Qian, Zhu, Yinyan, Guo, Hangwen, Wang, Wenbin, Zheng, Changlin, Yin, Lifeng, Zhou, Xiaodong, Xiang, Hongjun, Shen, Jian
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 04.11.2022
Subjects
Antiferromagnetism
Domains
Electronic devices
Ferromagnetism
Imaging techniques
Lanthanum compounds
Low temperature
Phase separation
Physics - Strongly Correlated Electrons
Praseodymium compounds
Strain relaxation
Substrates
Superlattices
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Summary:Strongly correlated materials often exhibit an electronic phase separation (EPS) phenomena whose domain pattern is random in nature. The ability to control the spatial arrangement of the electronic phases at microscopic scales is highly desirable for tailoring their macroscopic properties and/or designing novel electronic devices. Here we report the formation of EPS nanoscale network in a mono-atomically stacked LaMnO3/CaMnO3/PrMnO3 superlattice grown on SrTiO3 (STO) (001) substrate, which is known to have an antiferromagnetic (AFM) insulating ground state. The EPS nano-network is a consequence of an internal strain relaxation triggered by the structural domain formation of the underlying STO substrate at low temperatures. The same nanoscale network pattern can be reproduced upon temperature cycling allowing us to employ different local imaging techniques to directly compare the magnetic and transport state of a single EPS domain. Our results confirm the one-to-one correspondence between ferromagnetic (AFM) to metallic (insulating) state in manganite. It also represents a significant step in a paradigm shift from passively characterizing EPS in strongly correlated systems to actively engaging in its manipulation.
ISSN:2331-8422
DOI:10.48550/arxiv.2211.02226