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• W2891490237 abstract "Abstract The origin of the ferromagnetism in metal-free graphitic materials has been a decade-old puzzle. The possibility of long-range magnetic order in graphene has been recently questioned by the experimental findings that point defects in graphene, such as fluorine adatoms and vacancies, lead to defect-induced paramagnetism but no magnetic ordering down to 2 K. It remains controversial whether collective magnetic order in graphene can emerge from point defects at finite temperatures. This work provides a new framework for understanding the ferromagnetism in hydrogenated graphene, highlighting the key contribution of the spin-polarized pseudospin as a “mediator” of long-range magnetic interactions in graphene. Using first-principles calculations of hydrogenated graphene, we found that the unique ‘zero-energy’ position of H-induced quasilocalized states enables notable spin polarization of the graphene’s sublattice pseudospin. The pseudospin-mediated magnetic interactions between the H-induced magnetic moments stabilize the two-dimensional ferromagnetic ordering with Curie temperatures of T c = n H × 34,000 K for the atom percentage n H of H adatoms. These findings show that atomic-scale control of hydrogen adsorption on graphene can give rise to a robust magnetic order." @default.
• W2891490237 created "2018-09-27" @default.
• W2891490237 creator A5019564898 @default.
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• W2891490237 date "2018-09-17" @default.
• W2891490237 modified "2023-10-16" @default.
• W2891490237 title "Robust ferromagnetism in hydrogenated graphene mediated by spin-polarized pseudospin" @default.
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• W2891490237 doi "https://doi.org/10.1038/s41598-018-31934-0" @default.
• W2891490237 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6141587" @default.
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