Colossal Paramagnetic Moments in Metallic Carbon Nanotori
Abstract
Carbon nanostructures with unusually large paramagnetic moments have been discovered in a theoretical study of the electronic and magnetic properties of carbon nanotubes bent into toroids. Specifically, nanotori formed from metallic nanotubes with λF = 3T, where λF is the Fermi wavelength and T the translation vector of the nanotube, exhibit giant paramagnetic moments at selected radii (``magic radii''), while the ones with λF = T are paramagnetic at any radius. The large paramagnetic moment is due to the interplay between the toroidal geometry and the ballistic motion of the π electrons in the metallic nanotube.
- Publication:
-
Physical Review Letters
- Pub Date:
- May 2002
- DOI:
- 10.1103/PhysRevLett.88.217206
- Bibcode:
- 2002PhRvL..88u7206L