Effect of carbon nanotube on ballistic conduction through single-quantum-dot

TL;DR

This study investigates how a single-walled carbon nanotube influences ballistic electron conduction through a quantum dot, using analytical and atomic methods to analyze conductance and density of states.

Contribution

It introduces an analytical approach to model the interaction between quantum dots and carbon nanotubes in ballistic conduction scenarios.

Findings

Conductance varies with nanotube size and coupling strength.

Density of states shows characteristic features depending on nanotube parameters.

Electronic transport is significantly affected by nanotube-quantum dot interactions.

Abstract

We will study the competitive effect between the transport of a quantum dot adsorbed to a ballistic channel and laterally coupled to a single-walled carbon nanotube (SWNT). We will use the tight-binding approach to analytically write the SWNT Green function and the quantum dot will be solved by the atomic method for U very large. We will present curves of the electronic density of states for some different sizes of nanotubes. The results for the conductance curves will be presented as a function of Ef and for different values of n and hopping between the nanotube and the quantum dot.