Electronic properties of quantum dots formed by magnetic double barriers in quantum wires
arXiv:1104.5640 · doi:10.1103/PhysRevB.84.035319
Abstract
The transport through a quantum wire exposed to two magnetic spikes in series is modeled. We demonstrate that quantum dots can be formed this way which couple to the leads via magnetic barriers. Conceptually, all quantum dot states are accessible by transport experiments. The simulations show Breit-Wigner resonances in the closed regime, while Fano resonances appear as soon as one open transmission channel is present. The system allows to tune the dot's confinement potential from sub-parabolic to superparabolic by experimentally accessible parameters.
5 pages, 5 figures
References in corpus (8)
- The electronic properties of graphene
- Magnetic confinement of massless Dirac fermions in graphene
- A magnetic barrier in confined two-dimensional electron gases: Nanomagnetometers and magnetic switches
- Electron scattering on circular symmetric magnetic profiles in a two-dimensional electron gas
- Confined magnetic guiding orbit states
- Quantized magnetic confinement in quantum wires
- Resonant reflection at magnetic barriers in quantum wires
- Influence of magnetic field offsets on the resistance of magnetic barriers in two-dimensional electron gases