Reconstruction and Electronic Properties of Interface between Carbon Nanotubes and Ferromagnetic Co Electrodes

Abstract:

Article Preview

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.

Info:

Periodical:

Edited by:

Mohamed Othman

Pages:

183-187

Citation:

N. T. Cuong et al., "Reconstruction and Electronic Properties of Interface between Carbon Nanotubes and Ferromagnetic Co Electrodes", Applied Mechanics and Materials, Vols. 229-231, pp. 183-187, 2012

Online since:

November 2012

Export:

Price:

$38.00

[1] Bachtold A, Fuhrer M S, Plyasunov S, Forero M, Anderson E H, Zettl A and McEuen P L Phys. Rev. Lett. 84 (2000) 6082.

[2] Yao Z, Kane C L and Dekker C Phys. Rev. Lett. 84 (2000) 2936.

[3] Dresselhaus M, Dresselhaus G and Avouris Ph 2001 Carbon Nanotubes: Synthesis, Structure, Properties and Applications (Berlin: Springer).

[4] S. J. Tans, M. H. Devoret, H. Dai, A. Thess, R. E. Smalley, L. J. Geerligs and C. Dekker, Nature 386 (1997) 474-477.

DOI: https://doi.org/10.1038/386474a0

[5] K. Tsukagoshi, B. W. Alphenaar and H. Ago, Nature 401 (1999) 572.

[6] M. Shiraishi, T. Tkenobu, T. Iwai, Y. Iwasa, H. Kataura and M. Ata, Chem. Phys. Lett. 394, 110-113 (2004).

[7] Y. Ohno, S. Iwatsuki, T. Hiraoka, T. Okazaki, S. Kishimoto, K. Maezawa, H. Shinohara and T. Mizutani, Jpn. J. Appl. Phys. Part 1 42 4116 (2003).

DOI: https://doi.org/10.1143/jjap.42.4116

[8] Mohd Ambri Mohamed, Mohd Asyadi Azam, Eiji Shikoh and Akihiko Fujiwara, Jpn. J. Appl. Phys. 49 (2010) 02BD08.

DOI: https://doi.org/10.1143/jjap.49.02bd08

[9] Mohd Ambri Mohamed, Nobuhito Inami, Eiji Shikoh, Yoshiyuki Yamamoto, Hidenobu Hori and Akihiko Fujiwara, Sci. Technol. Adv. Mater. 9, (2008) 02519.

DOI: https://doi.org/10.1088/1468-6996/9/2/025019

[10] Nobuhito Inami, Mohd Ambri Mohamed, Eiji Shikoh and Akihiko Fujiwara, Appl. Phys. Lett. 92, (2008) 243115.

DOI: https://doi.org/10.1063/1.2949075

[11] W. J. M. Naber, S. Faez and W. G van der Wiel, Organic spintronics, J. Phys. D: Appl. Phys. 40, (2007) R205.

DOI: https://doi.org/10.1088/0022-3727/40/12/r01

[12] Information on http: /www. openmx-square. org.