Szczegóły publikacji
Opis bibliograficzny
Electron spin and charge switching in a coupled quantum-dot-quantum ring system / B. SZAFRAN, F. M. Peeters, S. BEDNAREK // Physical Review. B, Condensed Matter and Materials Physics ; ISSN 1098-0121. — Tytuł poprz.: Physical Review B : Condensed Matter. — 2004 — vol. 70 iss. 12, s. 125310-1–125310-9. — Bibliogr. s. 125310-9
Autorzy (3)
- AGHSzafran Bartłomiej
- Peeters François Maria
- AGHBednarek Stanisław
Dane bibliometryczne
| ID BaDAP | 20920 |
|---|---|
| Data dodania do BaDAP | 2005-03-18 |
| Tekst źródłowy | URL |
| DOI | 10.1103/PhysRevB.70.125310 |
| Rok publikacji | 2004 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Physical Review, B |
Abstract
Few-electron systems confined in a quantum dot laterally coupled to a surrounding quantum ring in the presence of an external magnetic field are studied by exact diagonalization. The distribution of electrons between the dot and the ring is influenced by the relative strength of the dot and ring confinement, and the magnetic field which induces transitions of electrons between the two parts of the system. These transitions are accompanied by changes in the periodicity of the Aharonov-Bohm oscillations of the ground-state angular momentum. The singlet-triplet splitting for a two electron system with one electron confined in the dot and the other in the ring exhibits piecewise linear dependence on the external field due to the Aharonov-Bohm effect for the ring-confined electron, in contrast to smooth oscillatory dependence of the exchange energy for laterally coupled dots in the side-by-side geometry.
