Multiple quantum phases in artificial double-dot molecules
arXiv:cond-mat/9906341 · doi:10.1016/S0038-1098(99)00305-1
Abstract
We study coupled semiconductor quantum dots theoretically through a generalized Hubbard approach, where intra- and inter-dot Coulomb Correlation, as well as tunneling effects are described on the basis of realistic electron wavefunctions. We find that the ground-state configuration of vertically-coupled double dots undergoes non-trivial quantum transitions as a function of the inter-dot distance d; at intermediate values of d we predict a new phase that should be observable in the addition spectra and in the magnetization changes.
RevTeX, 4 pages, 4 ps figures, to appear in Solid State Communications
Cited by in corpus (21)
- Carbon Nanotubes as Cooper Pair Beam Splitters
- Electro-optical properties of semiconductor quantum dots: Application to quantum information processing
- Transport in Coupled Quantum Dots: Kondo Effect Versus Anti-Ferromagnetic Correlation
- Dissociation of vertical semiconductor diatomic artificial molecules
- Laterally coupled few-electron quantum dots
- Molecular phases in coupled quantum dots
- Quantum phases in artificial molecules
- Double quantum dot as a spin rotator
- Electron-hole localization in coupled quantum dots
- Competing mechanisms for singlet-triplet transition in artificial molecules
- Local absorption spectra of artificial atoms and molecules
- Vertically coupled quantum dots in the local spin-density functional theory
- A vertical diatomic artificial molecule in the intermediate coupling regime in a parallel and perpendicular magnetic field
- Raman signatures of classical and quantum phases in coupled dots: A theoretical prediction
- Canted ground state in artificial molecules at high magnetic fields
- Vertically coupled double quantum rings at zero magnetic field
- Canted phase in double quantum dots
- Electron-hole bilayer quantum dots: Phase diagram and exciton localization
- Isospin phases of vertically coupled double quantum rings under the influence of perpendicular magnetic fields
- Molecular states observed in a single pair of strongly coupled self-assembled InAs quantum dots
- Quantum phases of correlated electrons in artificial molecules under magnetic fields