Using first-principles calculations based on density functional theory and
the nonequilibrium Green function formalism, we studied the spin transport
through metal-phthalocyanine (MPc, M=Ni, Fe, Co, Mn, Cr) molecules connected to
aurum nanowire electrodes. We found that the MnPc, FePc, and CrPc molecular
devices exhibit a perfect spin filtering effect compared to CoPc and NiPc.
Moreover, negative differential resistance appears in FePc molecular devices. Read More