Spin accumulation in a double-quantum-dot Aharonov-Bohm interferometer induced by Fano-Rashba effect

Motivated by the results in the previous work (Phys. Rev. B 73, 235301), we investigate the nonequilibrium spin accumulation in a double-quantum-dot Aharonov-Bohm interferometer, by considering a local Rashba interaction in this structure. It is found that the spin accumulation is determined by the nonresonant transmission and Rashba interaction. Namely, the Fano-Rashba effect is a necessary condition to achieve the spin accumulation in the quantum dot of the resonant channel. Furthermore, the spin accumulation can be adjusted by the shift of the level of the nonresonant-channel quantum dot. When the intradot Coulomb interactions are taken into account within the Hubbard-I approximation, the spin accumulation is fully manipulated.