Phys. Rev. B 75, 193407 (2007) [3 pages]Quantum ion-acoustic waves in single-walled carbon nanotubes studied with a quantum hydrodynamic modelReceived 19 December 2006; revised 3 March 2007; published 18 May 2007 The quantum ion-acoustic waves in single-wall carbon nanotubes are studied with the quantum hydrodynamic model, in which the electron and ion components of the nanotubes are regarded as a two-species quantum plasma system. An analytical expression of the dispersion relation is obtained for the linear disturbance. Numerical results show that the frequency of the ion-acoustic wave strongly depends on the nanotube’s radius in the long-wavelength cases. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.75.193407
DOI:
10.1103/PhysRevB.75.193407
PACS:
73.22.Lp, 52.35.Fp, 71.10.Ca
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