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. The transmission coefficients at different bias voltages were further presented to understand this phenomenon. These results would be useful in designing devices for future nanotechnology.
@article{arxiv.1702.07587,
title = {Spin filtering in transition-metal phthalocyanine molecules from first principles},
author = {Li Niu and Huan Wang and Lina Bai and Ximing Rong and Xiaojie Liu and Hua Li and Haitao Yin},
journal= {arXiv preprint arXiv:1702.07587},
year = {2017}
}