Volume 69, Number 6, March 2005
|1003 - 1009
|Condensed matter: electronic structure, electrical, magnetic, and optical properties
|16 February 2005
Conductance modulation of metallic carbon nanotubes by remote charged rings
Department of Physics and Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign - 405 North Mathews Avenue Urbana, IL 61801, USA
2 Physics Department, Lehigh University - 16 East Memorial Drive Bethlehem, PA 18015, USA
Accepted: 17 January 2005
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.
PACS: 73.63.Fg – Nanotubes / 71.30.+h – Metal-insulator transitions and other electronic transitions / 73.23.Ad – Ballistic transport
© EDP Sciences, 2005
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.