A Metal-Insulator Transition of the Buried MnO2 Monolayer in Complex Oxide Heterostructure

Heng-Jui Liu; Jheng-Cyuan Lin; Yue-Wen Fang; Jing-Ching Wang; Bo-Chao Huang; Xiang Gao; Rong Huang; Philip R Dean; Peter D Hatton; Yi-Ying Chin; Hong-Ji Lin; Chien-Te Chen; Yuichi Ikuhara; Ya-Ping Chiu; Chia-Seng Chang; Chun-Gang Duan; Qing He; Ying-Hao Chu

doi:10.1002/adma.201602281

A Metal-Insulator Transition of the Buried MnO₂ Monolayer in Complex Oxide Heterostructure

Adv Mater. 2016 Nov;28(41):9142-9151. doi: 10.1002/adma.201602281. Epub 2016 Aug 29.

Authors

Heng-Jui Liu^{1

2}, Jheng-Cyuan Lin³, Yue-Wen Fang⁴, Jing-Ching Wang⁵, Bo-Chao Huang³, Xiang Gao⁶, Rong Huang^{4

6}, Philip R Dean⁷, Peter D Hatton⁷, Yi-Ying Chin⁸, Hong-Ji Lin⁸, Chien-Te Chen⁸, Yuichi Ikuhara^{6

9}, Ya-Ping Chiu^{2

5}, Chia-Seng Chang³, Chun-Gang Duan⁴, Qing He¹⁰, Ying-Hao Chu^{11

12}

Affiliations

¹ Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, 30010, Taiwan.
² Department of Physics, National Taiwan Normal University, Taipei, 11677, Taiwan.
³ Institute of Physics, Academia Sinica, Taipei, 11529, Taiwan.
⁴ Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, Shanghai, 200241, China.
⁵ Department of Physics, National Sun Yat-sen University, Kaohsiung, 80424, Taiwan.
⁶ Nanostructures Research Laboratory, Japan Fine Ceramics Center, Nagoya, 456-8587, Japan.
⁷ Department of Physics, Durham University, Durham DH1 3LE, UK.
⁸ National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan.
⁹ Institute of Engineering Innovation, The University of Tokyo, Tokyo, 113-8656, Japan.
¹⁰ Department of Physics, Durham University, Durham DH1 3LE, UK. qing.he@durham.ac.uk.
¹¹ Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu, 30010, Taiwan. yhc@nctu.edu.tw.
¹² Institute of Physics, Academia Sinica, Taipei, 11529, Taiwan. yhc@nctu.edu.tw.

PMID: 27571277
DOI: 10.1002/adma.201602281

Abstract

A novel artificially created MnO₂ monolayer system is demonstrated in atomically controlled epitaxial perovskite heterostructures. With careful design of different electrostatic boundary conditions, a magnetic transition as well as a metal-insulator transition of the MnO₂ monolayer is unveiled, providing a fundamental understanding of dimensionality-confined strongly correlated electron systems and a direction to design new electronic devices.

Keywords: 2D materials; MnO2 monolayer; complex oxide heterostructures; manganites.