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arXiv · 0912.4436

Magnetic Quantum Wire as a Spin Filter: An Exact Study

Moumita Dey·Santanu K. Maiti·S. N. Karmakar
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Abstract

We propose that a magnetic quantum wire composed of magnetic and non-magnetic atomic sites can be used as a spin filter for a wide range of applied bias voltage. 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 through the wire. Our exact results may be helpful in fabricating mesoscopic or nano-scale spin filter.

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Moumita Dey, Santanu K. Maiti, S. N. Karmakar. 2009-12-22. Magnetic Quantum Wire as a Spin Filter: An Exact Study. https://doi.org/10.1016/j.physleta.2010.01.055

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