Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10710601 | Journal of Magnetism and Magnetic Materials | 2005 | 9 Pages |
Abstract
Spin-polarized transport through a non-interacting single-level quantum dot coupled to two ferromagnetic leads with non-collinear magnetizations is analyzed theoretically by the non-equilibrium Green function technique. It is shown that spin of an electron that has tunnelled on the dot precesses around an effective exchange field before it leaves the dot. The exchange field originates from interaction between the electron and external electrodes. Electric current, tunnel magnetoresistance, and average value of spin accumulated on the dot are calculated for an arbitrary angle between magnetic moments of the electrodes.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
W. RudziÅski, R. Åwirkowicz, J. BarnaÅ, M. WilczyÅski,