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• W4285291374 abstract "The spin-filter properties of two-dimensional carbon nanostructures based on graphene nanoribbons (GNRs) of finite length were explored by DFT modeling in conjunction with a Green's function approach. Two classes of systems were included, namely, GNR networks with vacant sites and armchair graphene nanoribbons (aGNRs) with substitutional Fe atoms. In particular, conditions for half-metallicity are explored, involving the limit of perfect current spin polarization upon traversing the nanoribbon. By the criterion of the magnetocurrent ratio, this limit is approached by zigzag graphene nanoribbons (zGNRs) when admission is made for bulk vacancies in conjunction with longitudinal strain. A similarly high magnetocurrent ratio is achieved by aGNR transmission elements when two C atoms are replaced with Fe atoms. The size and the sign of the spin current polarization depend sensitively on the number and the position of the ribbon defects, as well as the amount of longitudinal strain. These results are interpreted in terms of density-of-states distributions, transmission spectra, current–voltage profiles, and spin density distributions." @default.
• W4285291374 created "2022-07-14" @default.
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• W4285291374 date "2022-01-01" @default.
• W4285291374 modified "2023-09-30" @default.
• W4285291374 title "Toward graphene-based devices for nanospintronics" @default.
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• W4285291374 doi "https://doi.org/10.1016/b978-0-12-819514-7.00009-9" @default.
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