Dirac Fermion Quantum Hall Antidot in Graphene
arXiv:1904.02273 · doi:10.1103/PhysRevB.100.245130
Abstract
The ability to localize and manipulate individual quasiparticles in mesoscopic structures is critical in experimental studies of quantum mechanics and thermodynamics, and in potential quantum information devices, e.g., for topological schemes of quantum computation. In strong magnetic field, the quantum Hall edge modes can be confined around the circumference of a small antidot, forming discrete energy levels that have a unique ability to localize fractionally charged quasiparticles. Here, we demonstrate a Dirac fermion quantum Hall antidot in graphene in the integer quantum Hall regime, where charge transport characteristics can be adjusted through the coupling strength between the contacts and the antidot, from Coulomb blockade dominated tunneling under weak coupling to the effectively non-interacting resonant tunneling under strong coupling. Both regimes are characterized by single -flux and -charge oscillations in conductance persisting up to temperatures over 2 orders of magnitude higher than previous reports in other material systems. Such graphene quantum Hall antidots may serve as a promising platform for building and studying novel quantum circuits for quantum simulation and computation.
arXiv comment17 pages, 4 figures + 18 pages supplementary
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Cited by in corpus (12)
- Localizing fractional quasiparticles on graphene quantum hall antidots
- Optical flux pump in the quantum Hall regime
- Quantum Hall interferometry in triangular domains of marginally twisted bilayer graphene
- Tunable tunnel coupling in a double quantum antidot with cotunneling via localized state
- Neural network-based recognition of multiple nanobubbles in graphene
- Edge channels in a graphene Fabry-Perot interferometer
- Fabry-Perot and Aharonov-Bohm interference in ideal graphene nanoribbons
- Coulomb oscillations of a quantum antidot formed by an airbridged pillar gate in the integer and fractional quantum Hall regime
- Quantum computation with hybrid parafermion-spin qubits
- Localizing Individual Exciton on a Quantum Hall Antidot
- Triple Antidot Molecules
- Quantum statistics and self-interference in extended colliders