Electron-electron interactions in bilayer graphene quantum dots
arXiv:1312.1471 · doi:10.1103/PhysRevB.88.245432
Abstract
A parabolic quantum dot (QD) as realized by biasing nanostructured gates on bilayer graphene is investigated in the presence of electron-electron interaction. The energy spectrum and the phase diagram reveal unexpected transitions as function of a magnetic field. For example, in contrast to semiconductor QDs, we find a novel valley transition rather than only the usual singlet-triplet transition in the ground state of the interacting system. The origin of these new features can be traced to the valley degree of freedom in bilayer graphene. These transitions have important consequences for cyclotron resonance experiments.
5 pages, 5 figures, to appear in Phys. Rev. B
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Cited by in corpus (14)
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- Visualization and Manipulation of Bilayer Graphene Quantum Dots with Broken Rotational Symmetry and Nontrivial Topology
- Wigner localization in a graphene quantum dot with a mass gap
- Exciton states in a circular graphene quantum dot: magnetic field induced intravalley to intervalley transition
- Pair states in one-dimensional Dirac systems
- Valleytronic full configuration-interaction approach: An application to the excitation spectra of Si double-dot qubits
- Double quantum dots defined in bilayer graphene
- Electronic confinement in quantum dots of twisted bilayer graphene
- Electrically Tunable Fine Structure of Negatively Charged Excitons in Gated Bilayer Graphene Quantum Dots
- Optical Properties of Gated Bilayer Graphene Quantum Dots with Trigonal Warping
- Bound state properties of ABC-stacked trilayer graphene quantum dots