Topological effect on spin transport in a magnetic quantum wire: Green's function approach

Details Topological effect on spin transport in a magnetic quantum wire: Green's function approach Topological effect on spin transport in a magnetic quantum wire: Green's function approach

2010-02-11

arxiv.org/abs/1002.2345v3

Journal of Computational and Theoretical Nanoscience, Volume 8, Number 2, February 2011, pp. 253-260(8)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 9 figures

Scientific paper

10.1166/jctn.2011.1686

We explore spin dependent transport through a magnetic quantum wire which is attached to two non-magnetic metallic electrodes. We adopt a simple tight-binding Hamiltonian to describe the model where the quantum wire is attached to two semi-infinite one-dimensional non-magnetic electrodes. Based on single particle Green's function formalism all the calculations are performed numerically which describe two-terminal conductance and current-voltage characteristics through the wire. Quite interestingly we see that, beyond a critical system size probability of spin flipping enhances significantly that can be used to design a spin flip device. Our numerical study may be helpful in fabricating mesoscopic or nano-scale spin devices.

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