Abstract
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 language | English (US) |
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Pages (from-to) | 1003-1009 |
Number of pages | 7 |
Journal | Europhysics Letters |
Volume | 69 |
Issue number | 6 |
DOIs | |
State | Published - Mar 2005 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy