Signatures of single quantum dots in graphene nanoribbons within the quantum Hall regime

Abstract

We report on the observation of periodic conductance oscillations near quantum Hall plateaus in suspended graphene nanoribbons. They are attributed to single quantum dots that form in the narrowest part of the ribbon, in the valleys and hills of a disorder potential. In a wide flake with two gates, a double-dot system's signature has been observed. Electrostatic confinement is enabled in single-layer graphene due to the gaps that form between Landau levels, suggesting a way to create gate-defined quantum dots that can be accessed with quantum Hall edge states.

References in corpus (26)

• The electronic properties of graphene
• Ultrahigh electron mobility in suspended graphene
• Boron nitride substrates for high-quality graphene electronics
• Energy Band Gap Engineering of Graphene Nanoribbons
• Energy Gaps in Graphene Nanoribbons
• Half-Metallic Graphene Nanoribbons
• Chiral tunneling and the Klein paradox in graphene
• Chaotic Dirac billiard in graphene quantum dots
• Micrometer-scale ballistic transport in encapsulated graphene at room temperature
• Spin qubits in graphene quantum dots
• Landau Level Splitting in Graphene in High Magnetic Fields
• Energy gaps in etched graphene nanoribbons
• Interaction phenomena in graphene seen through quantum capacitance
• Spin States in Graphene Quantum Dots
• Snake Trajectories in Ultraclean Graphene p-n Junctions
• Gate defined zero- and one-dimensional confinement in bilayer graphene
• Scalable Tight-Binding Model for Graphene
• Fabry-Pérot interference in gapped bilayer graphene with broken anti-Klein tunneling
• Edge-State Velocity and Coherence in a Quantum Hall Fabry-Perot Interferometer
• Large yield production of high mobility freely suspended graphene electronic devices on a PMGI based organic polymer
• Magneto-transport through graphene nano-ribbons
• Guiding of Electrons in a Few Mode Ballistic Graphene Channel
• Chiral Symmetry Breaking and the Quantum Hall Effect in Monolayer Graphene
• Gate tuneable beamsplitter in ballistic graphene
• Transconductance fluctuations as a probe for interaction induced quantum Hall states in graphene
• Fabrication of ballistic suspended graphene with local-gating

Cited by in corpus (5)

• Electrostatically confined monolayer graphene quantum dots with orbital and valley splittings
• Co-existence of classical snake states and Aharanov-Bohm oscillations along graphene p-n junctions
• Chiral interface states in graphene $p$-$n$ junctions
• Oscillating magnetoresistance in graphene p-n junctions at intermediate magnetic fields
• Edge channel confinement in a bilayer graphene $n$-$p$-$n$ quantum dot