Efficient organometallic spin filter between single-wall carbon nanotube or graphene electrodes.
We present a theoretical study of spin transport in a class of molecular systems consisting of an organometallic benzene-vanadium cluster placed in between graphene or single-wall carbon-nanotube-model contacts. Ab initio modeling is performed by combining spin density functional theory and nonequilibrium Green's function techniques. We consider weak and strong cluster-contact bonds. Depending on the bonding we find from 73% (strong bonds) up to 99% (weak bonds) spin polarization of the electron transmission, and enhanced polarization with increased cluster length.
Department of Micro- and Nanotechnology (MIC), NanoDTU, Technical University of Denmark (DTU), Ørsteds Plads, Bldg. 345E, DK-2800 Lyngby, Denmark.
Mohammad
M
Koleini
Magnus
M
Paulsson
Mads
M
Brandbyge