Spin-flip Fano–Kondo resonant tunneling through a quantum dot interferometer responded by a rotating magnetic field

• A quantum dot interferometer under the perturbation of a rotating magnetic field is studied.
• Spin-polarized current is derived by using the nonequilibrium Greenʼs function method.
• The spin current is tuned to exhibit Kondo–Fano resonance.
• The spin current varies with respect to Aharonov–Bohm phase, gate voltage, and Zeeman fields.

The Fano and Kondo cooperated resonant tunneling through a quantum dot interferometer under the perturbation of a rotating magnetic field is investigated theoretically. The spin-polarized current components have been derived generally by employing the Keldysh nonequilibrium Greenʼs function method, through which the charge and spin currents are determined directly. The numerical calculations on spin and charge currents are performed to show the compound features of mesoscopic transport associated with the Kondo, Fano, and Zeeman effects intimately. The induced spin current in the Kondo regime is much different from the one in the non-interacting regime. The spin current is tuned from resonant peak to valley by varying external parameters.