ELECTRON-ELECTRON INTERACTION IN CARBON NANOSTRUCTURES

摘要

The electron-electron interaction in carbon nanostructures was studied. A new method which allows to determine the electron-electron interaction constant λ_c from the analysis of quantum correction to the magnetic susceptibility and the magnetoresistance was developed. Three types of carbon materials: arc-produced multi walled carbon nanotubes (arc-MWNTs), CVD-produced catalytic multiwalled carbon nanotubes (c-MWNTs) and pyrolytic carbon were used for investigation. We found that λ_c = 0.2 for arc-MWNTs (before and after bromination treatment); λ_c =0.1 for pyrolytic graphite; λ_c > 0 for c-MWNTs. We conclude that the curvature of graphene layers in carbon nanostructures leads to the increase of the electron-electron interaction constant λ_c.