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Title: Reconstruction and electronic properties of interface between carbon nanotubes and ferromagnetic Co electrodes
Authors: Cuong, Nguyen Tien
Mohamed, Mohd Ambri
Otsuka, Nobuo
Chi, Damhieu
Keywords: Carbon nanotubes;Co electrodes;Ferromagnetic electrodes;Fisrt-principle calculatons;A-carbon;Covalent bonding;Electrodes;Ferromagnetic electrodes
Issue Date: 2012
Publisher: H. : ĐHQGHN
Abstract: The reconstruction and electronic structures of the interfaces between single wall carbon nano tubes and ferromagnetic Co electrodes were studied in the framework of density functional theory. The obtained results revealed that there is a strong interaction between carbon nano tubes and Co electrodes. At the interface region, Top layers of Co surface have been significantly reconstructed. The nature of chemical bonds at the Co-C interface is covalent bonding. The increase of the electron density occurs mainly at the interface where a substantial concentration of electron accumulates in Co-C bonds. A small amount of charge transfer from Co electrode to carbon nano tube junction was found. In addition, the spin polarization of Co atoms at the interface region has been suppressed due to the interaction with a carbon nano tube. It implies that the spin transport through this layer is low, which results in the small hysteretic magneto-resistance of carbon nano tube devices.
Description: Applied Mechanics and Materials Volume 229-231, 2012, Pages 183-187
Appears in Collections:Bài báo của ĐHQGHN trong Scopus

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