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Large Magnetic Susceptibility Anisotropy of Metallic Carbon Nanotubes



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


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.
Physical Review Letters


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


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], (Accessed May 21, 2024)


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Created July 2, 2010, Updated November 10, 2018