Study of couplings effect on the performance of a spin-current diode: Nonequilibrium Green's function based model

Details Study of couplings effect on the performance of a spin-current diode: Nonequilibrium Green's function based model Study of couplings effect on the performance of a spin-current diode: Nonequilibrium Green's function based model

2012-04-26

arxiv.org/abs/1204.5858v1

Solid State Communications 151 (2011) 1479-1482

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 3 figures

Scientific paper

In this paper, spin-dependent transport through a spin diode composed of a quantum dot coupled to a normal metal and a ferromagnetic lead is studied. The current polarization and the spin accumulation are analyzed using the equations of motion method within the nonequilibrium Green's function formalism. We present a suitable method for computing Green's function without carrying out any self-consistent calculation. The influence of coupling strength and magnetic field on the spin current is studied and observed that this device cannot work as a spin diode under certain conditions.

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