Addition energies in semiconductor quantum dots: Role of electron-electron interaction

TL;DR

This paper presents a theoretical approach to studying addition energies in semiconductor quantum dots, emphasizing the importance of electron-electron interactions and three-dimensional Coulomb effects for accurate predictions.

Contribution

It introduces a practical theoretical scheme for analyzing addition spectra in quantum dots, incorporating detailed electron-electron interactions and magnetic field effects.

Findings

Addition spectra show Hund-like shell filling patterns.

Three-dimensional Coulomb interaction is crucial for accurate conductance predictions.

The model aligns well with recent experimental results.

Abstract

We show that the addition spectra of semiconductor quantum dots in the presence of magnetic field can be studied through a theoretical scheme that allows an accurate and practical treatment of the single particle states and electron-electron interaction up to large numbers of electrons. The calculated addition spectra exhibit the typical structures of Hund-like shell filling, and account for recent experimental findings. A full three dimensional description of Coulomb interaction is found to be essential for predicting the conductance characteristics of few-electron semiconductor structures.