Dimensionality crossovers of the σ plasmon in coaxial carbon nanotubes

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Abstract
Dimensionality crossovers of plasmons in carbon nanotubes, modeled as curved layered electron-gas superstructures, are investigated. For small wave vectors, the σ plasmons exhibit a transition from a one- to a three-dimensional character as the number of graphitic shells increases, in correspondence with recent experiments. For large wave vectors, plasmons of two-dimensional character are predicted.