Imaging Localized States in Graphene Nanostructures

TL;DR

This paper uses scanning-gate microscopy to visualize and locate conductance resonances in a graphene quantum dot and its constrictions, providing insights into localized states in nanostructures.

Contribution

It introduces a method to spatially image localized states in graphene nanostructures, enhancing understanding of their microscopic physical processes.

Findings

Imaged conductance resonances in a graphene quantum dot

Located localized states in constrictions in real space

Provided spatial maps of localized electronic states

Abstract

Probing techniques with spatial resolution have the potential to lead to a better understanding of the microscopic physical processes and to novel routes for manipulating nanostructures. We present scanning-gate images of a graphene quantum dot which is coupled to source and drain via two constrictions. We image and locate conductance resonances of the quantum dot in the Coulomb-blockade regime as well as resonances of localized states in the constrictions in real space.