Transport through a strongly coupled graphene quantum dot in perpendicular magnetic field
arXiv:1105.0267 · doi:10.1186/1556-276X-6-253
Abstract
We present transport measurements on a strongly coupled graphene quantum dot in a perpendicular magnetic field. The device consists of an etched single-layer graphene flake with two narrow constrictions separating a 140 nm diameter island from source and drain graphene contacts. Lateral graphene gates are used to electrostatically tune the device. Measurements of Coulomb resonances, including constriction resonances and Coulomb diamonds prove the functionality of the graphene quantum dot with a charging energy of around 4.5 meV. We show the evolution of Coulomb resonances as a function of perpendicular magnetic field, which provides indications of the formation of the graphene specific 0th Landau level. Finally, we demonstrate that the complex pattern superimposing the quantum dot energy spectra is due to the formation of additional localized states with increasing magnetic field.
6 pages, 4 figures
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- Protected edge states in silicene antidots and dots in magnetic field
- Magnetic field induced charge redistribution in disordered graphene double quantum dots
- Impact of electron-phonon coupling on electron transport through T-shaped arrangements of quantum dots in the Kondo regime