Results of the numerical simulation for the spin-filtering device shown in Fig. 1b. The spin polarization Pz of the output current in reservoir D1 is shown as a function of gate voltage Vg on the quantum dot. The height of the tunnel barriers is US = UD1 = 0.9EF, whereas (a) UD2/EF = 0.9, (b) 0.8, (c) 0.7, and (d) 0.6.
Yokoyama and Eto Nanoscale Research Letters 2011 6:436 doi:10.1186/1556-276X-6-436