Nonlinear Electronic Transport Behavior of $\Upsilon$ -Graphyne Nanotubes

In this paper, we have investigated the electronic transport properties and current-voltage characteristics of the armchair and zigzag T-graphyne nanotubes by the SIESTA and TRANSIESTA packages including density functional theory and nonequilibrium Green's function for the four chiral vectors 2,3, 4, and 5. We found that the current in T-graphyne nanotubes is very negligible for low bias voltages, but it enhances precipitously for voltages above the threshold voltage. Both zigzag and armchair T-graphyne nanotubes reveal negative differential resistance, for specific diameters, which is a promising result for nano-based device usages such as switching and memory circuits. Finally, the characteristics of these nanotubes are similar to those of a two-way tunneling diode. Therefore, we can expect a new application that produces oscillation.