Resonant tunnelling features in the transport spectroscopy of quantum dots

TL;DR

This review discusses resonant tunnelling features in quantum dot transport spectroscopy, emphasizing how to distinguish different physical origins of observed signatures to better understand quantum dot properties and improve quantum information applications.

Contribution

It provides a comprehensive overview of resonant tunnelling features in quantum dots, including methods to differentiate their physical origins in transport spectroscopy.

Findings

Identifies various phenomena causing similar spectroscopic signatures

Provides experimental techniques to distinguish intrinsic and extrinsic effects

Highlights importance of correct feature classification for quantum dot applications

Abstract

We present a review of features due to resonant tunnelling in transport spectroscopy experiments on quantum dots and single donors. The review covers features attributable to intrinsic properties of the dot as well as extrinsic effects, with a focus on the most common operating conditions. We describe several phenomena that can lead to apparently identical signatures in a bias spectroscopy measurement, with the aim of providing experimental methods to distinguish between their different physical origins. The correct classification of the resonant tunnelling features is an essential requirement to understand the details of the confining potential or predict the performance of the dot for quantum information processing.