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We present a theoretical study of low temperature nonequilibrium transportthrough an interacting quantum dot in the presence of Zeeman magnetic field andcurrent injection into one of its leads. By using a self-consistentrenormalized equation of motion approach, we show that the injection of aspin-polarized current leads to a modulation of the Zeeman splitting of theKondo peak in the differential conductance. We find that an appropriate amountof spin accumulation in the lead can restore the Kondo peak by compensating thesplitting due to magnetic field. By contrast when the injected current isspin-unpolarized, we establish that both Zeeman-split Kondo peaks are equallyshifted and the splitting remains unchanged. Our results quantitatively explainthe experimental findings reported in KOBAYASHI T. et al., Phys. Rev. Lett.104, 036804 (2010). These features could be nicely exploited for the controland manipulation of spin in nanoelectronic and spintronic devices.

Out-of-equilibrium Kondo Effect in a Quantum Dot: Interplay of Magnetic Field and Spin Accumulation