The Two-Dimensional MnO2/Graphene Interface: Half-metallicity and Quantum Anomalous Hall State

Liyong Gan, Qingyun Zhang, Chun-Sheng Guo, Udo Schwingenschlögl, Yong Zhao

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We explore the electronic properties of the MnO2/graphene interface by first-principles calculations, showing that MnO2 becomes half-metallic. MnO2 in the MnO2/graphene/MnO2 system provides time-reversal and inversion symmetry breaking. Spin splitting by proximity occurs at the Dirac points and a topologically nontrivial band gap is opened, enabling a quantum anomalous Hall state. The half-metallicity, spin splitting, and size of the band gap depend on the interfacial interaction, which can be tuned by strain engineering.
Original languageEnglish (US)
Pages (from-to)2119-2125
Number of pages7
JournalThe Journal of Physical Chemistry C
Issue number4
StatePublished - Jan 21 2016

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