Transport properties of an interacting quantum dot with a non-uniform magnetizationN. Sedlmayr and J. Berakdar
Institut für Physik, Martin-Luther Universität Halle-Wittenberg - Heinrich-Damerow-Str.4, 06120 Halle (Saale), Germany, EU
received 7 April 2008; accepted in final form 8 July 2008; published September 2008
published online 19 August 2008
We study the influence of the non-homogeneity of a magnetization field on the behaviour of interacting electrons in a quantum dot. In particular we investigate the magnetotransport properties when the dot is weakly coupled to two ferromagnetic leads. We take into account the interactions in the quantum dot non-perturbatively. For a magnetization which varies slowly on the scale of the Fermi wavelength, the non-homogeneity effect is described by a gauge potential that can be treated perturbatively.
72.25.Mk - Spin transport through interfaces.
73.63.Kv - Quantum dots.
85.75.-d - Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields.
© EPLA 2008