Conductance through the disclination dipole defect in metallic carbon nanotubes

TL;DR

This paper investigates how a specific lattice defect, the disclination dipole, affects electronic conductance in metallic carbon nanotubes, using a self-consistent perturbation approach and transfer-matrix calculations.

Contribution

It introduces a detailed analysis of the disclination dipole's impact on conductance, considering curvature and sublattice mixing effects in metallic nanotubes.

Findings

Disclination dipole induces measurable changes in conductance.

The Fano factor is affected by the defect.

Self-consistent perturbation approach effectively models defect influence.

Abstract

The electronic transport properties of a metallic carbon nanotube with the five-seven disclination pair characterized by a lattice distortion vector are investigated. The influence of the disclination dipole includes induced curvature and mixing of two sublattices. Both these factors are taken into account via a self-consistent perturbation approach. The conductance and the Fano factor are calculated within the transfer-matrix technique. PACS: 73.63.Fg, 72.80.Rj, 72.10.Fk