Spin dependent tunneling through a quantum dot attached to ferromagnetic electrodes with non-collinear magnetizations

Józef Barnaś 1,2Malgorzata Wawrzyniak 1Martin Gmitra 1

1. Adam Mickiewicz University, Department of Physics, Umultowska 85, Poznań 61-614, Poland
2. Polish Academy of Sciences, Institute of Molecular Physics, Mariana Smoluchowskiego 17, Poznań 60-179, Poland

Abstract

Resonant tunneling through an interacting single-level quantum dot in an external magnetic field and coupled to ferromagnetic electrodes with non-collinear magnetizations has been analyzed theoretically. The non-equilibrium Green function technique based on the equation of motion method has been applied in order to calculate the angular dependence of the tunnel magnetoresistance and the average spin components on the dot. The Green functions have been calculated in the Hartree-Fock approximation. The calculations are restricted to the weak coupling regime.

 

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Presentation: poster at E-MRS Fall Meeting 2005, Symposium D, by Józef Barnaś
See On-line Journal of E-MRS Fall Meeting 2005

Submitted: 2005-08-16 12:38
Revised:   2009-06-07 00:44