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A schematic device model of carbon atomic chains bridging two zigzag graphene nanoribbon leads. The red frame indicates the left leads while the blue one indicates the right leads. The scattering region includes the carbon chain and the surface layers. The direction of electron transport is along the carbon atomic chain labeled as .
The spin-dependent electron transmission at zero bias. [(a) and (b)] Spin transmission of with the antiparallel/parallel spin orientation of two leads. [(c) and (d)] Spin transmission of with the antiparallel/parallel spin orientation of two leads. [(e) and (f)] show surfaces of the constant spin-resolved local DOS evaluated at the Fermi level.
The spin-resolved curve of with the parallel/antiparallel spin orientation of two leads. The inset is bias-voltage dependent magnetoresistance.
(a) TSP and (b) MR as a function of number of carbon atoms in chain at zero bias.
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