Half-metallic antiferromagnets induced by non-magnetic adatoms on bilayer silicene

Transition metal-free magnetism and two-dimensional p-state half-metals have been a fascinating subject of research due to their potential applications in nanoelectronics and spintronics. By applying density functional theory calculations, we predict that bilayer silicene can be an interlayer antife...

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Bibliographic Details
Published in:RSC advances 2023-01, Vol.13 (4), p.244-241
Main Authors: Ouyang, Xiao-Fang, Zhang, Yu-Zhong, Wang, Lu, Liu, De-Sheng
Format: Article
Language:English
Subjects:
Adatoms
Antiferromagnetism
Bilayers
Charge transfer
Density functional theory
Ferromagnetism
First principles
Interlayers
Mathematical analysis
Metallicity
Nanoelectronics
Nanoribbons
Silicene
Spintronics
Substrates
Transition metals
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Summary:Transition metal-free magnetism and two-dimensional p-state half-metals have been a fascinating subject of research due to their potential applications in nanoelectronics and spintronics. By applying density functional theory calculations, we predict that bilayer silicene can be an interlayer antiferromagnetic ground state. Interestingly, the half-metallicity is realized by adsorbing non-magnetic atoms on the antiferromagnetic bilayer silicene in the absence of transition magnetic atoms, nanoribbons, ferromagnetic substrates and magnetic field. Then, on the basis of first principles calculations and theoretical analysis, we show that the realization of half-metallicity is induced by the split of antiferromagnetic degeneracy due to the localization of transfer charge from the adatom to silicene. Our findings may open a new avenue to silicene-based electronic and spintronic devices. Half-metallicity could be realized by deposition of non-magnetic atoms on a layered two-dimensional material with an interlayer antiferromagnetic state. After connecting the left and right electrodes, spin polarized current can be output.
ISSN:2046-2069
2046-2069
DOI:10.1039/d2ra06955e