Computer simulation of electrical characteristics of single-walled carbon nanotube (9,0) with Stone-Wales defect

In the framework of the density functional theory, using the method of nonequilibrium Green's functions and in the local density approximation, the electrical characteristics of different configurations of a single-walled carbon nanotube with Stone-Wales defects are investigated. The calculation is implemented in the Atomistix ToolKit with Virtual NanoLab program. The current-voltage, dI/dV-characteristics and the density of states of the nanostructures under consideration were calculated. It is shown that the nature of the current flowing through defective carbon nanotubes depends on the extent of the Stone-Wales defects. It was found that a carbon nanotube with two consecutively connected Stone-Wales defects at a bias voltage of +/- 2.6 V has a negative differential conductivity of -170 mu S. The obtained results can be useful for calculations of new promising electronic devices of nanoelectronics based on a carbon nanotube.