Fast detection of single-charge tunneling to a graphene quantum dot in a multi-level regime

TL;DR

This paper presents a rapid method for detecting single-charge tunneling in a graphene quantum dot using RF charge detection, supported by an analytical model that matches experimental data.

Contribution

It introduces an analytical model for tunneling rates in multi-level regimes and demonstrates its accuracy with experimental results.

Findings

RF charge detection effectively measures tunneling rates

The analytical model aligns well with experimental data

Single-charge tunneling can be detected rapidly in graphene quantum dots

Abstract

In situ tunable radio-frequency charge detection is used for the determination of the tunneling rates into and out of a graphene single quantum dot connected to only one lead. An analytical model for calculating these rates in the multi-level tunneling regime is presented and found to correspond very well to our experimental observations.