Figure 2
From: Efficient spin filter using multi-terminal quantum dot with spin-orbit interaction
Calculated results of the conductance G 1,± to the drain 1 for spin ±1/2 in the impurity Anderson model with three leads. In the abscissa, ε d = (ε 1 + ε 2)/2, where ε 1 and ε 2 are the energy levels in the quantum dot. Solid and broken lines indicate G 1,+ and G 1,-, respectively. The level broadening by the tunnel coupling to the source and drain 1 is ΓS = ΓD1 ≡ Γ (V S,1/V S,2 = 1/2, V D1,1/VD1,2 = -3), whereas that to drain 2 is (a) ΓD2 = 0.2Γ, (b) 0.5Γ, (c) Γ, and (d) 2Γ (V D2,1/V D2,2 = 1). Δε = ε 2 - ε 1 = 0.2Γ. The strength of SO interaction is ΔSO = 0.2Γ.