Fine Spin Filtering Effect in Co-Phthalocyanine Molecule Induced by the Spin Polarization of Co Atom

Abstract:

Spintronic devices will play a very important role in future information technology. In this study, By spin-polarized density-functional theory calculations combined with the Keldysh nonequilibrium Green’s method, the effect of the spin direction of Co atom in Co- phthalocyanine molecule in modulating spin filtering effects under external biases are investigated. Here, an individual single molecule Co-phthalocyanine is sandwiched between two infinite 8-zigzag-graphene nanoribbon electrodes. we find that the spin direction of the Co atom relative to the magnetic polarization of the left and right electrodes can improve the spin filtering effect greatly. when the polarization direction of the two electrodes is antiparallel and the polarization of Co atom in the Co-phthalocyanine molecule upward, the configuration posesses almost perfectly spin-filter effect. The underlying mechanism of the perfect spin filtering action is applied.

• Periodical: Applied Mechanics and Materials (Volume 597)
• Pages: 127-130
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.597.127
• Online since: July 2014
• Authors: Yan Hong Zhou*, X.H. Qiu, L.L. Zhou, Y.L. Peng
• Keywords: Density Functional Theory (DFT), Phthalocyanine Molecule, Spin Filter

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