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Large Magnetic Susceptibility Anisotropy of Metallic Carbon Nanotubes

Published

Author(s)

Jeffrey A. Fagan, Erik K. Hobbie, Jun Kono, Thomas Searles, Y Imanaka, T Takamasu, H Ajiki

Abstract

Through magnetic linear dichroism spectroscopy, the magnetic susceptibility anisotropy of metallic single-walled carbon nanotubes has been extracted and found to be 2-4 times greater than values for semiconducting single-walled carbon nanotubes. This large anisotropy is consistent with our calculations and can be understood in terms of large orbital paramagnetism of electrons in metallic nanotubes arising from the Aharonov-Bohm-phase-induced gap opening in a parallel ¯eld. We also compare our values with previous work for semiconducting nanotubes, which con¯rm a break from the prediction that the magnetic susceptibility anisotropy increases linearly with the diameter.
Citation
Physical Review Letters
Volume
105

Keywords

nanotube, SWNT, SWCNT, magnetic field, alignment, dichroism

Citation

Fagan, J. , Hobbie, E. , Kono, J. , Searles, T. , Imanaka, Y. , Takamasu, T. and Ajiki, H. (2010), Large Magnetic Susceptibility Anisotropy of Metallic Carbon Nanotubes, Physical Review Letters, [online], https://doi.org/10.1103/PhysRevLett.105.017403 (Accessed May 21, 2024)

Issues

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Created July 2, 2010, Updated November 10, 2018