Kondo effect in the presence of the spin accumulation and non-equilibrium spin currents

Abstract

We present a theoretical description of the spin accumulation effect in metallic Fermi leads on the Kondo effect in the quantum dot attached to those. It has been shown that the spin accumulation by breaking the spin symmetry leads to the suppression of the Kondo effect in some cases. In order to better understand the observed effects, we analyze the spin currents in the system, depending on the spin accumulation of the electrodes, for both symmetrical and anti-symmetrical configuration of spin accumulation. We demonstrate that in the absence of the Kondo resonance splitting the suppression of the Kondo effect is related to the presence of the non-equilibrium spin current in the system.