sigma- and pi-defects at graphene nanoribbon edges: Building spin filters
Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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Data(s) |
20/10/2012
20/10/2012
2008
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Resumo |
The presence of certain kinds of defects at the edges of monohydrogenated zigzag graphene nanoribbons changes dramatically the charge transport properties inducing a spin-polarized conductance. Using an approach based on density functional theory and nonequilibrium Green`s function formalism to calculate the transmittance, we classify the defects in different classes depending on their distinct transport properties: (i) sigma-defects, which do not affect the transmittance close to the Fermi energy (E(F)); and (ii) pi-defects, which cause a spin polarization of the transmittance and that can be further divided into either electron or hole defects if the spin transport polarization results in larger transmittance for the up or down spin channel, respectively. |
Identificador |
NANO LETTERS, v.8, n.8, p.2293-2298, 2008 1530-6984 http://producao.usp.br/handle/BDPI/29425 10.1021/nl800991j |
Idioma(s) |
eng |
Publicador |
AMER CHEMICAL SOC |
Relação |
Nano Letters |
Direitos |
restrictedAccess Copyright AMER CHEMICAL SOC |
Palavras-Chave | #PSEUDOPOTENTIALS #GRAPHITE #Chemistry, Multidisciplinary #Nanoscience & Nanotechnology #Materials Science, Multidisciplinary |
Tipo |
article original article publishedVersion |