Two-electron lateral quantum-dot molecules in a magnetic field

TL;DR

This paper investigates the electronic and magnetic properties of two-electron lateral quantum-dot molecules under magnetic fields, focusing on energy differences, magnetization, vortex formation, and the effects of symmetry distortion.

Contribution

It provides a detailed analysis of how magnetic fields and symmetry distortions influence two-electron quantum-dot molecules using exact diagonalization.

Findings

Magnetic field significantly affects singlet-triplet energy splitting.

Symmetry distortion alters magnetization and vortex patterns.

Results enhance understanding of quantum-dot molecule behavior under external fields.

Abstract

Laterally coupled quantum dot molecules are studied using exact diagonalization techniques. We examine the two-electron singlet-triplet energy difference as a function of magnetic field strength and investigate the magnetization and vortex formation of two- and four-minima lateral quantum dot molecules. Special attention is paid to the analysis of how the distorted symmetry affects the properties of quantum-dot molecules.