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arXiv · 1001.0524

Large Magnetic Susceptibility Anisotropy of Metallic Carbon Nanotubes

T. A. Searles·Y. Imanaka·T. Takamasu·H. Ajiki·J. A. Fagan·E. K. Hobbie·J. Kono
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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 field. We also compare our values with previous work for semiconducting nanotubes, which confirm a break from the prediction that the magnetic susceptibility anisotropy increases linearly with the diameter.

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T. A. Searles, Y. Imanaka, T. Takamasu, H. Ajiki, J. A. Fagan, E. K. Hobbie, J. Kono. 2010-01-04. Large Magnetic Susceptibility Anisotropy of Metallic Carbon Nanotubes. https://doi.org/10.1103/physrevlett.105.017403

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