A Metal-Insulator Transition of the Buried MnO<sub>2</sub> Monolayer in Complex Oxide Heterostructure.

Liu, Heng-Jui; Lin, Jheng-Cyuan; Fang, Yue-Wen; Wang, Jing-Ching; Huang, Bo-Chao; Gao, Xiang; Huang, Rong; Dean, Philip R et al. · Adv Mater · 2016

basic_science · Level V

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Abstract

A novel artificially created MnO<sub>2</sub> 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 MnO<sub>2</sub> monolayer is unveiled, providing a fundamental understanding of dimensionality-confined strongly correlated electron systems and a direction to design new electronic devices.