Two-Dimensional MnO2/Graphene Interface: Half-Metallicity and Quantum Anomalous Hall State | Zendy

LiYong Gan | Zendy; Qingyun Zhang | Zendy; Chunsheng Guo | Zendy; Udo Schwingenschlögl | Zendy; Yong Zhao | Zendy

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

Author(s) -

LiYong Gan,

Qingyun Zhang,

Chunsheng Guo,

Udo Schwingenschlögl,

Yong Zhao

Publication year - 2015

Publication title -

the journal of physical chemistry c

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.401

H-Index - 289

eISSN - 1932-7455

pISSN - 1932-7447

DOI - 10.1021/acs.jpcc.5b08272

Subject(s) - graphene , point reflection , condensed matter physics , quantum hall effect , band gap , dirac (video compression format) , physics , spin (aerodynamics) , quantum , materials science , quantum mechanics , electron , neutrino , thermodynamics

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

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