Abstract
We theoretically study the impact of electron–electron scattering on the phase coherence length in a multiwall carbon nanotube (modeled as just the outermost shell electrostatically disturbed by the inner ones). Our numerical results suggest that the strong suppression of the weak localization at energies corresponding to the onset of new energy sub-bands below the Fermi level, may be explained in terms of the intra-valley electron scattering due to long-range (weakly screened) Coulomb interactions. Moreover, we have found that under these circumstances the estimated temperature-dependent phase coherence length obeys the standard power law with the exponential very close to - 1 3 , in agreement with both the experiments and theoretical predictions for quasi one-dimensional systems.
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