Two-Dimensional Hexagonal Transition-Metal Oxide for
Spintronics
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Abstract
Two-dimensional
materials have been the hot subject of studies
due to their great potential in applications. However, their applications
in spintronics have been blocked by the difficulty in producing ordered
spin structures in 2D structures. Here we demonstrated that the ultrathin
films of recently experimentally realized wurtzite MnO can automatically
transform into a stable graphitic structure with ordered spin arrangement
via density functional calculation, and the stability of graphitic
structure can be enhanced by external strain. Moreover, the antiferromagnetic
ordering of graphitic MnO single layer can be switched into half-metallic
ferromagnetism by small hole-doping, and the estimated Curie temperature
is higher than 300 K. Thus, our results highlight a promising way
toward 2D magnetic materials