Perfect spin filtering controlled by an electric field in a bilayer graphene junction: Effect of layer-dependent exchange energy

Jatiyanon Kitakorn¹, Tang I-Ming², Soodchomshom Bumned^{1, †,}

Plot of spin polarization versus electric field-induced gap Δ_E in the case of E = h for different values of U: (a) 0 meV, (b) 5 meV, and (c) 10 meV, respectively. The S_P(AP) represents spin polarization of the P-(AP-) junction. Perfect switching of spin polarization from +100% to −100% controlled by electric field is predicted only in the AP-junction.