Experimental imaging and atomistic modeling of electron and hole quasiparticle wave functions in InAs/GaAs quantum dots

TL;DR

This paper combines experimental magnetotunneling and atomistic modeling to analyze electron and hole wave functions in InAs/GaAs quantum dots, revealing effects of correlations, symmetry, piezoelectricity, and unusual hole charging sequences.

Contribution

It provides a comprehensive approach integrating experiments and atomistic calculations to understand quasiparticle states in quantum dots, highlighting new phenomena like non-Aufbau hole charging.

Findings

Insights into quantum states from combined theory and experiment

Identification of effects of correlations, symmetry, and piezoelectricity

Observation of a non-standard hole charging sequence

Abstract

We present experimental magnetotunneling results and atomistic pseudopotential calculations of quasiparticle electron and hole wave functions of self-assembled InAs/GaAs quantum dots. The combination of a predictive theory along with the experimental results allows us to gain direct insight into the quantum states. We monitor the effects of (i) correlations, (ii) atomistic symmetry and (iii) piezoelectricity on the confined carriers and (iv) observe a peculiar charging sequence of holes that violates the Aufbau principle.