Investigation of electron paramagnetic resonance in carbon tubes
Institute of Physics PAN - al.Lotników 32/46,
02-668 Warszawa, Poland
2 Institute of Vacuum Technology - ul.Dluga 44/50, 00-241 Warszawa, Poland
Accepted: 6 February 1996
Electron paramagnetic resonance (EPR) on carbon nanotubes was measured in a wide range of temperatures, the resonance disappeared after oxidizing the tubes. The results are discussed in terms of graphite properties and a model introducing a deformation potential to describe tubular structure. It leads to persistent ring currents in the magnetic field due to the carriers circular motion around a tube. A spin–angular-momentum interaction is discussed in an attempt to explain the lack of EPR in purified carbon nanotubes.
PACS: 61.46.+w – Solid clusters (including fullerenes) and nanoparticles / 79.60.Jv – Interfaces; heterostructures; nanostructures / 76.30.Pk – Conduction electrons
© EDP Sciences, 1996