The Charge Transport in (2, 2) Armchair Carbon Nanotube: A Theoretical Modeling

Abstract

Carbon nanotubes are excellent charge transports due to the relationship between the length–diameter in the order of microns to nanometers, respectively, thus being characterized as ballistic conductors and excellent materials for field emission applications in electronic devices. We study the Fowler-Nordheim formalism and first-principles calculations of metallic (2, 2) singlewall carbon nanotube with a diameter of 0.24 nm. Our results are consistent for field emission devices nanostructured with these specifications. Summarize the following results: (i) for the both methods used the same trend I–V; (ii) exponential behavior and quasi-ballistic, indicating the proportionality between I and V characteristic of (2, 2) carbon nanotube armchair, (iii) tendency of inelastic tunneling under intense field electric, which is consistent with studies on inelastic electron tunneling spectroscopy (IETS); (iv) matching number Mulliken charge for using the formalism of the Fowler-Nordheim equation to reduce the computational first-principles calculations for this (2, 2) carbon nanotube.