Photon-assisted electronic and spin transport through two T-shaped three-quantum-dot molecules embedded in an Aharonov

Photon-assisted electronic and spin transport through two T-shaped three-quantum-dot molecules embedded in an Aharonov–Bohm interferometer

Bai Jiyuan^{1, 3}, Li Li^{1, †}, He Zelong^{2, ‡}, Ye Shujiang³, Zhao Shujun³, Dang Suihu², Sun Weimin¹

(color online) Spin-dependent average currents ⟨I⟩_↑ (solid line) and ⟨I_↓ (dotted line) versus DC bias V_DC under a symmetric time-dependent external field (W_L(R) = ω = 1.0). The parameters are k = 2.0, ε_d = 0 with (a) ψ = Δϕ_R = π/8 (blue curve), ψ = Δϕ_R = π/4 (green curve), ψ = Δϕ_R = π/2 (red curve) and (b) Δϕ_R = π / 8 (black curve), Δϕ_R = π/4 (green curve), Δϕ_R = π/3 (red curve), ψ = π / 2.