Efficient Organometallic Spin Filter between Single-Wall Carbon Nanotube or Graphene Electrodes

Mohammad Koleini, Magnus Paulsson, and Mads Brandbyge
Phys. Rev. Lett. 98, 197202 – Published 7 May 2007

Abstract

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.

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  • Received 29 November 2006

DOI:https://doi.org/10.1103/PhysRevLett.98.197202

©2007 American Physical Society

Authors & Affiliations

Mohammad Koleini, Magnus Paulsson, and Mads Brandbyge*

  • Department of Micro- and Nanotechnology (MIC), NanoDTU, Technical University of Denmark (DTU), Ørsteds Plads, Bldg. 345E, DK-2800 Lyngby, Denmark

  • *Electronic address: mbr@mic.dtu.dk

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Issue

Vol. 98, Iss. 19 — 11 May 2007

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