Charge detection in gate-defined bilayer graphene quantum dots
arXiv:1903.05564 · doi:10.1021/acs.nanolett.9b01617
Abstract
We report on charge detection in electrostatically-defined quantum dot devices in bilayer graphene using an integrated charge detector. The device is fabricated without any etching and features a graphite back gate, leading to high quality quantum dots. The charge detector is based on a second quantum dot separated from the first dot by depletion underneath a 150 nm wide gate. We show that Coulomb resonances in the sensing dot are sensitive to individual charging events on the nearby quantum dot. The potential change due to single electron charging causes a step-like change (up to 77 %) in the current through the charge detector. Furthermore, the charging states of a quantum dot with tunable tunneling barriers and of coupled quantum dots can be detected.
References in corpus (27)
- Two-Dimensional Gas of Massless Dirac Fermions in Graphene
- Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
- Boron nitride substrates for high-quality graphene electronics
- Chaotic Dirac billiard in graphene quantum dots
- Single-shot read-out of an individual electron spin in a quantum dot
- Gate-induced insulating state in bilayer graphene devices
- Asymmetry gap in the electronic band structure of bilayer graphene
- Spin qubits in graphene quantum dots
- Counting statistics of single-electron transport in a quantum dot
- Electron Transport in Disordered Graphene Nanoribbons
- Energy gaps in etched graphene nanoribbons
- Tunable Graphene Single Electron Transistor
- Robust fractional quantum Hall states and continuous quantum phase transitions in a half-filled bilayer graphene Landau level
- Differential Charge Sensing and Charge Delocalization in a Tunable Double Quantum Dot
- Real-time detection of single electron tunneling using a quantum point contact
- Observation of excited states in a graphene quantum dot
- Electrostatic confinement of electrons in graphene nano-ribbons
- Spin and Valley States in Gate-defined Bilayer Graphene Quantum Dots
- Charge Detection in Graphene Quantum Dots
- Electrostatically induced quantum point contact in bilayer graphene
- A Graphene Quantum Dot with a Single Electron Transistor as Integrated Charge Sensor
- Coupled quantum dots in bilayer graphene
- Probing relaxation times in graphene quantum dots
- Gate-defined electron-hole double dots in bilayer graphene
- Time-resolved charge detection in graphene quantum dots
- Valley subband splitting in bilayer graphene quantum point contact
- Charge detection in a bilayer graphene quantum dot
Cited by in corpus (35)
- Probing quantum devices with radio-frequency reflectometry
- Electron-hole crossover in gate-controlled bilayer graphene quantum dots
- Long-lived valley states in bilayer graphene quantum dots
- Single-electron double quantum dots in bilayer graphene
- Spin relaxation in a single-electron graphene quantum dot
- Out-of-plane dielectric susceptibility of graphene in twistronic and Bernal bilayers
- Single-shot readout in graphene quantum dots
- Gate-Controlled Quantum Dots Based on Two-Dimensional Materials
- Shell Filling and Trigonal Warping in Graphene Quantum Dots
- Cornertronics in Two-Dimensional Second-Order Topological Insulators
- Pulsed-gate spectroscopy of single-electron spin states in bilayer graphene quantum dots
- Counting Statistics of Single Electron Transport in Bilayer Graphene Quantum Dots
- Dispersive sensing of charge states in a bilayer graphene quantum dot
- Valley current generation using biased bilayer graphene dots
- Coherent Charge Oscillations in a Bilayer Graphene Double Quantum Dot
- Spin-valley locked excited states spectroscopy in a one-particle bilayer graphene quantum dot
- Electrostatic detection of Shubnikov-de-Haas oscillations in bilayer graphene by Coulomb resonances in gate-defined quantum dots
- Radio-frequency reflectometry in bilayer graphene devices utilizing micro graphite back-gates
- A strain-engineered graphene qubit in a nanobubble
- Specular electron focusing between gate-defined quantum point contacts in bilayer graphene
- Pauli blockade catalogue and three- and four-particle Kondo effect in bilayer graphene quantum dots
- Scattering of topological kink-antikink states in bilayer graphene structures
- Scanning Gate Microscopy of Localized States in a gate-defined Bilayer Graphene Channel
- Dipole coupling of a bilayer graphene quantum dot to a high-impedance microwave resonator
- Dynamics of van der Waals Charge Qubit in 2D Bilayers: Ab initio Quantum Transport and Qubit Measurement
- Tunable p-n junction barriers in few-electron bilayer graphene quantum dots
- Entropy spectroscopy of a bilayer graphene quantum dot
- Geometry effects in topologically confined bilayer graphene loops
- Formation of multiple quantum dots in ZnO heterostructures
- Conductance of electrostatic wire junctions in bilayer graphene
- Charge state estimation in quantum dots using a Bayesian approach
- Trivial and topological bound states in bilayer graphene quantum dots and rings
- Four-band effective square lattice model for Bernal-stacked bilayer graphene
- Electrostatic tuning of bilayer graphene edge modes
- Radio-frequency charge detection on graphene electron-hole double quantum dots