Szczegóły publikacji
Opis bibliograficzny
Fractional conductance oscillations in quantum rings : wave packet picture of transport in a few-electron system / T. CHWIEJ, B. SZAFRAN // Journal of Physics : Condensed Matter ; ISSN 0953-8984. — 2013 — vol. 25 no. 15, s. 155802-1–155802-11. — Bibliogr. s. 155802-11, Abstr.
Autorzy (2)
Dane bibliometryczne
| ID BaDAP | 72974 |
|---|---|
| Data dodania do BaDAP | 2013-04-11 |
| Tekst źródłowy | URL |
| DOI | 10.1088/0953-8984/25/15/155802 |
| Rok publikacji | 2013 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Journal of Physics-Condensed Matter |
Abstract
We study electron transfer across a two-terminal quantum ring using a time-dependent description of the scattering process. For the considered scattering event the quantum ring is initially charged with one or two electrons, with another electron incident to the ring from the input channel. We study the electron transfer probability (T) as a function of the external magnetic field. We determine the periodicity of T for a varied number of electrons confined within the ring. For that purpose we develop a method to describe the wave packet dynamics for a few electrons participating in the scattering process, taking into full account the electron-electron correlations. We find that electron transfer across the quantum ring initially charged by a single electron acquires a distinct periodicity of half of the magnetic flux quantum (Phi(0)/2), corresponding to the formation of a transient two-electron state inside the ring. In the case of a three-electron scattering problem with two electrons initially occupying the ring, a period of Phi(0)/3 for T is formed in the limit of thin channels. The effect of disorder present in the confinement potential of the ring is also discussed.
