Quartet states in two-electron quantum dots in bilayer graphene

Abstract

Trapping electrons in quantum dots and controlling their collective quantum states is crucial for converting semiconductor structures into bits of quantum information processing. Here, we study single- and two-particle states in quantum dots formed in gapped bilayer graphene (BLG), where the electron's valley states appear in pair with their spin quantum number and we analyse spin- and valley-singlet and triplet states for various BLG and dot parameters, as well as two-particle interaction strength and external magnetic field.

arXiv comment6 pages, 3 figures, plus supplementary information

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Cited by in corpus (35)

• Electron-hole crossover in gate-controlled bilayer graphene quantum dots
• Kondo effect and spin-orbit coupling in graphene quantum dots
• Long-lived valley states in bilayer graphene quantum dots
• Spin-valley coupling in single-electron bilayer graphene quantum dots
• Tunable valley splitting and bipolar operation in graphene quantum dots
• Particle-hole symmetry protects spin-valley blockade in graphene quantum dots
• Single-shot readout in graphene quantum dots
• Pauli Blockade of Tunable Two-Electron Spin and Valley States in Graphene Quantum Dots
• Gate-Controlled Quantum Dots Based on Two-Dimensional Materials
• Shell Filling and Trigonal Warping in Graphene Quantum Dots
• Visualization and Manipulation of Bilayer Graphene Quantum Dots with Broken Rotational Symmetry and Nontrivial Topology
• Probing two-electron multiplets in bilayer graphene quantum dots
• Theory of tunneling spectra for a few-electron bilayer graphene quantum dot
• Spin-valley locked excited states spectroscopy in a one-particle bilayer graphene quantum dot
• Valley and spin polarized broken symmetry states of interacting electrons in gated MoS${}_2$ quantum dots
• Electrostatic detection of Shubnikov-de-Haas oscillations in bilayer graphene by Coulomb resonances in gate-defined quantum dots
• Kagomé network of chiral miniband-edge states in double-aligned graphene-hexagonal boron nitride structures
• Gate-tunable regular and chaotic electron dynamics in ballistic bilayer graphene cavities
• Isolated and hybrid bilayer graphene rings
• Extended Hubbard model describing small multi-dot arrays in bilayer graphene
• Pauli blockade catalogue and three- and four-particle Kondo effect in bilayer graphene quantum dots
• Impact of competing energy scales on the shell-filling sequence in elliptic bilayer graphene quantum dots
• Switching spin filling sequence in a bilayer graphene quantum dot through trigonal warping
• Electrically Tunable Fine Structure of Negatively Charged Excitons in Gated Bilayer Graphene Quantum Dots
• Three-carrier spin blockade and coupling in bilayer graphene double quantum dots
• Chiral Wigner crystal phases induced by Berry curvature
• Entropy spectroscopy of a bilayer graphene quantum dot
• Optical Properties of Gated Bilayer Graphene Quantum Dots with Trigonal Warping
• Tuning confined states and valley g-factors by quantum dot design in bilayer graphene
• Electric field tunable spin-orbit gap in a bilayer graphene/WSe${}_2$ quantum dot
• Electrically tunable MoSe${}_2$/WSe${}_2$ heterostructure-based quantum dot
• Electronic and Spin-Orbit Properties of hBN Encapsulated Bilayer Graphene
• The role of antisymmetric orbitals and electron-electron interactions on the two-particle spin and valley blockade in graphene double quantum dots
• Continuously Tunable Berry Phase and Valley-Polarized Energy Spectra in Bilayer Graphene Quantum Dots
• Spin-valley 0.7 anomaly in bilayer graphene/WSe${}_2$ quantum point contacts