Finite band effects over the linear conductance through a quantum wire coupled with a quantum dot: X-boson treatment

TL;DR

This paper investigates how finite band effects influence the linear conductance in a quantum wire with a side-coupled quantum dot, revealing peaks linked to localized states outside the conduction band.

Contribution

It introduces an X-boson treatment to analyze finite band effects on conductance, providing insights consistent with recent experimental observations.

Findings

Lateral conductance peaks occur near the conduction band edge.

Peaks are associated with renormalized localized levels outside the conduction band.

Results align with recent experimental data.

Abstract

We study the electronic transport through a quantum wire (QW) with a strong side coupled quantum dot (QD). We obtain a linear conductance with lateral peaks when the gate voltage, is located near the edge of the conduction band. The calculated density of states shows, that these peaks are associated with renormalized localized levels out side of the conduction band. These results are compatibles with recent experimental results.