We simulate the time-resolved dynamics of localized electrons in a 2DEG system, where an external magnetic eld creates quantum Hall edge states, and properly polarized split gates dene a Mach-Zehnder electron interferometer. The carriers travelling inside the Hall channels consist of localized wave packets of edge states: they are propagated numerically by means of a Fourier split-step approach. We find that the energy-dependent scattering process at the quantum point contacts, together with the nite energy distribution of the carriers, have a remarkable eect on the transmission coecient T of the device. We provide an analytical model to justify the characteristics of T which is in good agreement with the numerical simulations.
Time-dependent modelling of single-electron interferometry with edge-states / Beggi, Andrea; Bertoni, Andrea; Bordone, Paolo. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - STAMPA. - 647:1(2015), pp. 1-4. (Intervento presentato al convegno 19th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures (EDISON'19) tenutosi a Salamanca, Spain nel 29 June - 2 July 2015) [10.1088/1742-6596/647/1/012023].
Time-dependent modelling of single-electron interferometry with edge-states
BEGGI, ANDREA;BORDONE, Paolo
2015
Abstract
We simulate the time-resolved dynamics of localized electrons in a 2DEG system, where an external magnetic eld creates quantum Hall edge states, and properly polarized split gates dene a Mach-Zehnder electron interferometer. The carriers travelling inside the Hall channels consist of localized wave packets of edge states: they are propagated numerically by means of a Fourier split-step approach. We find that the energy-dependent scattering process at the quantum point contacts, together with the nite energy distribution of the carriers, have a remarkable eect on the transmission coecient T of the device. We provide an analytical model to justify the characteristics of T which is in good agreement with the numerical simulations.File | Dimensione | Formato | |
---|---|---|---|
paper.pdf
Open access
Descrizione: Articolo principale
Tipologia:
Versione pubblicata dall'editore
Dimensione
1.21 MB
Formato
Adobe PDF
|
1.21 MB | Adobe PDF | Visualizza/Apri |
Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris