A quantitative study of bias triangles presented in chemical potential space

TL;DR

This paper introduces a method to analyze bias triangles in chemical potential space, enabling straightforward comparison of different bias configurations, which is useful for Pauli-spin blockade demonstrations and adaptable to less stable systems.

Contribution

It presents a novel analysis and visualization technique for bias triangles in chemical potential space, facilitating comparison across bias configurations and extending applicability to less stable devices.

Findings

All four bias configurations can be represented on a single plot.

The method simplifies comparison of bias directions in quantum dot systems.

Proposed variation extends analysis to less stable systems.

Abstract

We present measurements of bias triangles in several biasing configurations. Thorough analysis of the data allows us to present data from all four possible bias configurations on a single plot in chemical potential space. This presentation allows comparison between different biasing directions to be made in a clean and straightforward manner. Our analysis and presentation will prove useful in demonstrations of Pauli-spin blockade where comparisons between different biasing directions are paramount. The long term stability of the CMOS compatible Si/SiO2 only architecture leads to the success of this analysis. We also propose a simple variation to this analysis that will extend its use to systems lacking the long term stability of these devices.