Spin separation in a T ballistic nanojunction due to lateral-confinement-induced spin–orbit coupling

摘要: We propose a new scheme of spin filtering employing ballistic nanostructures in two-dimensional electron gases (2DEGs). The proposal is essentially based on the spin–orbit (SO) interaction arising from lateral confining electric field. This sets basic difference other works crosses and T junctions with conventional SO term 2DEG confinement. discuss consequences this different approach for magnetotransport properties device, showing that filter can principle be used not only to generate polarized current but also perform an measurement polarization charge current. focus single-channel transport investigate numerically