Abstract
Computer modeling of the differential conductance of symmetry connected armchair (n,n) and zigzag (2n,0) nanotubes was carried out in the framework of the surface Green's function matching (SGFM) method. It is shown that the heterojunctions (n,n)/(2n,0) have a band gap in the electron energy spectrum. It is demonstrated that the I-V curve increases with constant values with the increase of the voltage. The height of the I-V curve plateau is bigger for heterojunctions of larger diameter. It is shown that the maximum of the differential conductance of heterojunctions with bigger diameter is at comparatively low voltage.
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