Figure 2: Tunable high-efficiency spin-filter.
From: Gated silicene as a tunable source of nearly 100% spin-polarized electrons
(a) Geometry of the spin-filter and the profile of the potential barrier U(xi). The two coloured atoms on the lattice emphasize the buckled structure. (b) Spin-polarization of the filter as a function of μ0 in the constriction. The blue (green) line corresponds to the case of applying potential barrier with a rectangular (smooth) shape (see text). (c,d) are typical dispersion relations for the wide and the constriction regions, respectively.
