Tuning confined states and valley g-factors by quantum dot design in bilayer graphene
arXiv:2404.09910 · doi:10.1002/pssb.202300395
Abstract
Electrostatically confined quantum dots in bilayer graphene have shown potential as building blocks for quantum technologies. To operate the dots, e.g., as qubits, a precise understanding and control of the confined states and their properties is required. Herein, a large-scale numerical characterization of confined quantum states in bilayer graphene dots is performed over an extensive range of gate-tunable parameters such as the dot size, depth, shape, and the bilayer graphene gap. The dot states' orbital degeneracy, wave function distribution, and valley g-factor are established and the parametric dependencies to achieve different regimes are provided. It is found that the dot states are highly susceptible to gate-dependent confinement and material parameters, enabling efficient tuning of confined states and valley g-factor modulation by quantum dot design.
References in corpus (26)
- The electronic properties of bilayer graphene
- Spin qubits in graphene quantum dots
- Electrically driven single electron spin resonance in a slanting Zeeman field
- Hyperfine interaction and electron-spin decoherence in graphene and carbon nanotube quantum dots
- Gate-Defined Josephson Junctions in Magic-Angle Twisted Bilayer Graphene
- Highly Tunable Junctions and Nonlocal Josephson Effect in Magic Angle Graphene Tunneling Devices
- Electron-hole crossover in gate-controlled bilayer graphene quantum dots
- Spin-valley coupling in single-electron bilayer graphene quantum dots
- Tunable valley splitting and bipolar operation in graphene quantum dots
- Spin relaxation in a single-electron graphene quantum dot
- A Tunable Monolithic SQUID in Twisted Bilayer Graphene
- Particle-hole symmetry protects spin-valley blockade in graphene quantum dots
- Quartet states in two-electron quantum dots in bilayer graphene
- Single-shot readout in graphene quantum dots
- Pauli Blockade of Tunable Two-Electron Spin and Valley States in Graphene Quantum Dots
- Visualization and Manipulation of Bilayer Graphene Quantum Dots with Broken Rotational Symmetry and Nontrivial Topology
- Shell Filling and Trigonal Warping in Graphene Quantum Dots
- Coherent Jetting behind a gate-defined Channel in Bilayer Graphene
- Probing two-electron multiplets in bilayer graphene quantum dots
- Pulsed-gate spectroscopy of single-electron spin states in bilayer graphene quantum dots
- Theory of tunneling spectra for a few-electron bilayer graphene quantum dot
- Dispersive sensing of charge states in a bilayer graphene quantum dot
- Gate-defined electron interferometer in bilayer graphene
- Counting Statistics of Single Electron Transport in Bilayer Graphene Quantum Dots
- Specular electron focusing between gate-defined quantum point contacts in bilayer graphene
- Impact of competing energy scales on the shell-filling sequence in elliptic bilayer graphene quantum dots