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1 Materials Science Poland

1 2006

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Resonant tunneling through a single level quantum dot attached to ferromagnetic leads with non-collinear magnetizations

Wawrzyniak M., Gmitra M., Barnaś J.

Materials Science Poland

2006

Vol. 24, No. 3

695--700

Resonant tunnelling through a non-interacting single-level quantum dot attached to ferromagnetic leads is analysed theoretically. The magnetic moments of the leads are assumed to be non-collinear. Apart from this, an external magnetic field is applied to the system, which is non-collinear with the magnetizations. The magnetic moments of the leads and the external magnetic field are, however, in a common plane. Basic transport characteristics, including current-voltage curves, differential conductance, and tunnel magnetoresistance associated with magnetization rotation, are calculated using the non-equilibrium Green function technique. The dependence of transport characteristics on the bias voltage has been calculated numerically.