Electron-electron interaction in multiwall carbon nanotubes
arXiv:cond-mat/0110313 · doi:10.1016/S0038-1098(01)00448-3
Abstract
Magnetic susceptibility $Ï$ of pristine and brominated arc-produced sample of multiwall carbon nanotubes was measured from 4.2 to 400 K. An additional contribution $ÎÏ(T)$ to diamagnetic susceptibility $Ï(T)$ of carbon nanotubes was found at T $<$ 50 K for both samples. It is shown that $ÎÏ(T)$ are dominated by quantum correction to $Ï$ for interaction electrons (interaction effects-IE). The IE shows a crossover from two-dimensional to three-dimensional at $B$ = 5.5 T. The effective interaction between electrons for interior layers of nanotubes are repulsion and the electron-electron interaction $λ$$_c$ was estimated to be $λ_c\sim $ 0.26.
10 pages, 7 figures