Conductance modulation of metallic carbon nanotubes by remote charged rings

S. Barraza-Lopez, S. V. Rotkin, Y. Li, K. Hess

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


We calculate the effects of a longitudinal electrostatic perturbation on a metallic single-wall carbon nanotube and demonstrate conductance modulation. Such external modulation would be completely screened in bulk 3D metals but is possible in SWNTs because their electrons are quasi-two-dimensional and can interact with a nearby system of charges. The resultant modulation of the conductance is determined by the strength of the self-consistent potential and its periodicity over shorter or longer distances. We employ the zero-temperature single-particle Green's function transport approach in the empirical tight-binding approximation to quantify the modulation of conductance and also consider the limit of a superlattice.

Original languageEnglish (US)
Pages (from-to)1003-1009
Number of pages7
JournalEurophysics Letters
Issue number6
StatePublished - Mar 2005

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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