Magnetic Quantum Wire as a Spin Filter: An Exact Study

Details Magnetic Quantum Wire as a Spin Filter: An Exact Study Magnetic Quantum Wire as a Spin Filter: An Exact Study

2009-12-22

arxiv.org/abs/0912.4436v3

Physics Letters A, Volume 374, Issues 13-14, 29 March 2010, Pages 1522-1526

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 5 figures

Scientific paper

10.1016/j.physleta.2010.01.055

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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