A vertical diatomic artificial molecule in the intermediate coupling regime in a parallel and perpendicular magnetic field

TL;DR

This paper reports experimental and theoretical analysis of a vertically coupled two-quantum-dot artificial molecule's ground state in magnetic fields, showing good agreement and phase transition reproduction.

Contribution

It provides the first detailed experimental and theoretical study of a vertical diatomic artificial molecule in intermediate coupling under magnetic fields.

Findings

Good agreement between experiment and theory

Reproduction of phase transitions in the system

Insights into the behavior of coupled quantum dots in magnetic fields

Abstract

We present experimental results for the ground state electrochemical potentials of a few electron semiconductor artificial molecule made by vertically coupling two quantum dots, in the intermediate coupling regime, in perpendicular and parallel magnetic fields up to 5 T. We perform a quantitative analysis based on local-spin density functional theory. The agreement between theoretical and experimental results is good, and the phase transitions are well reproduced.