Spin current manipulation through a Rashba dot by tunable nonequilibrium Fano-Kondo effect

Though the Rashba-type spin-orbit interaction offers a possibility of manipulating electron's spin totally by electric field, it has been argued that the mere existence of spin-orbit interaction is insufficient to produce such spin-dependent transport. In the present work, we investigate how spin transport through a single-level dot is possible: Finite spin current appears as a result of spin-orbit interaction, strong electronic correlation and finite bias voltage. We show, by applying finite interaction slave-boson mean field theory, that Kondo physics is responsible for generating such spin-dependent transport.