Reconstruction and electronic properties of interface between carbon nanotubes and ferromagnetic co electrodes
The reconstruction and electronic structures of the interfaces between single wall carbon nanotubes 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 nanotubes and Co elect...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Trans Tech Publications Ltd., Switzerland
2012
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/29880/1/AMM.229-231.183.pdf http://irep.iium.edu.my/29880/ http://dx.doi.org/10.4028/www.scientific.net/AMM.229-231.183 |
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| Summary: | The reconstruction and electronic structures of the interfaces between single wall carbon
nanotubes 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 nanotubes 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
nanotube 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 nanotube. It implies that the spin transport
through this layer is low, which results in the small hysteretic magneto-resistance of carbon
nanotube devices. |
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