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Spin transport properties of armchair graphene nanoribbons doped with Fe and B atoms
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DOI：10.1016/j.mseb.2019.04.014.png)
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Abstract
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Spin-polarized density functional theory combined with non-equilibrium Green's function (NEGF) formalism is used to study the electronic, magnetic and transport properties of hydrogen-terminated armchair graphene nanoribbons doped with iron and boron atoms. We consider hydrogen terminated graphene nanoribbons with width up to seven C-C dimmers (7-AGNR-H). Our main focus is to investigate the effects of Fe and B doping on the spin transport properties of graphene nanoribbons. The substituted boron atoms at the nanoribbon edges suppress the semiconductor to metal transition. This substitutional B and Fe atoms respectively act as electrode and scattering region for the electronic transport along the nanoribbons. It is revealed that negative differential resistance (NDR) behavior and 86% spin filtering effect can be realized, which suggest that doped AGNR devices as the promising candidates in nanospintronics.
Keywords:
Transport properties
Graphene nanoribbons
OFT, TRANSIESTA
Spintronic
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