Tailoring 10 nm Scale Suspended Graphene Junctions and Quantum Dots
arXiv:1502.01666 · doi:10.1021/nl503151g
Abstract
The possibility to make 10 nm scale, and low-disorder, suspended graphene devices would open up many possibilities to study and make use of strongly coupled quantum electronics, quantum mechanics, and optics. We present a versatile method, based on the electromigration of gold-on-graphene bow-tie bridges, to fabricate low-disorder suspended graphene junctions and quantum dots with lengths ranging from 6 nm up to 55 nm. We control the length of the junctions, and shape of their gold contacts by adjusting the power at which the electromigration process is allowed to avalanche. Using carefully engineered gold contacts and a nonuniform downward electrostatic force, we can controllably tear the width of suspended graphene channels from over 100 nm down to 27 nm. We demonstrate that this lateral confinement creates high-quality suspended quantum dots. This fabrication method could be extended to other two-dimensional materials.
References in corpus (32)
- Ultrahigh electron mobility in suspended graphene
- Energy Band Gap Engineering of Graphene Nanoribbons
- Electronic transport in two dimensional graphene
- Suspended Graphene: a bridge to the Dirac point
- Doping graphene with metal contacts
- Chaotic Dirac billiard in graphene quantum dots
- Energy gaps, topological insulator state and zero-field quantum Hall effect in graphene by strain engineering
- Quantum interference and Klein tunneling in graphene heterojunctions
- Measurement of Scattering Rate and Minimum Conductivity in Graphene
- Quantum-limited shot noise in graphene
- From the Kondo Regime to the Mixed-Valence Regime in a Single-Electron Transistor
- Mechanical Control of Spin States in Spin-1 Molecules and the Underscreened Kondo Effect
- Preparation and Detection of a Mechanical Resonator Near the Ground State of Motion
- Strain-induced pseudo-magnetic field for novel graphene electronics
- Graphene mechanical oscillators with tunable frequency
- Graphene Nanoribbons with Smooth Edges Behave as Quantum Wires
- Mechanically-adjustable and electrically-gated single-molecule transistors
- Coupling graphene mechanical resonators to superconducting microwave cavities
- Pseudomagnetic fields and ballistic transport in a suspended graphene sheet
- High-Field Electrical and Thermal Transport in Suspended Graphene
- Temperature Control of Electromigration to form Gold Nanogap Junctions
- Realization of Pristine and Locally-Tunable One-Dimensional Electron Systems in Carbon Nanotubes
- Quantum Dots at Room Temperature carved out from Few-Layer Graphene
- Effect of contact induced states on minimum conductivity in graphene
- Synthetic electric fields and phonon damping in carbon nanotubes and graphene
- Quantum behavior of graphene transistors near the scaling limit
- Electronic Thermal Conductivity Measurements in Intrinsic Graphene
- Fabrication of large addition energy quantum dots in graphene
- Etched graphene quantum dots on hexagonal boron nitride
- Few-hundred GHz Carbon Nanotube NEMS
- Tearing of Free-Standing Graphene
- Ultra-short suspended single-wall carbon nanotube transistors
Cited by in corpus (5)
- Graphene Quantum Strain Transistors
- Graphene kirigami as a platform for stretchable and tunable quantum dot arrays
- Coupling graphene nanomechanical motion to a single-electron transistor
- Giant Electron-hole Charging Energy Asymmetry in Ultra-short Carbon Nanotubes
- Resonant field emission from noble-metal/graphene heterostructures