Szczegóły publikacji
Opis bibliograficzny
Conductance microscopy of quantum dots weakly or strongly coupled to the conducting channel / K. KOLASIŃSKI, B. SZAFRAN // New Journal of Physics [Dokument elektroniczny]. - Czasopismo elektroniczne ; ISSN 1367-2630. — 2014 — vol. 16 art. no. 053044, s. 1–16. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 15–16, Abstr. — Publikacja dostępna online od: 2014-05-22
Autorzy (2)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 82324 |
|---|---|
| Data dodania do BaDAP | 2014-07-16 |
| Tekst źródłowy | URL |
| DOI | 10.1088/1367-2630/16/5/054044 |
| Rok publikacji | 2014 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | New Journal of Physics |
Abstract
We consider scanning gate conductance microscopy of an open quantum dot that is connected to the conducting channel using the wave function description of the quantum transport and a finite difference approach. We discuss the information contained in conductance ( G) maps. We demonstrate that the maps for a delta-like potential perturbation exactly reproduce the local density of states for a quantum dot that is weakly coupled to the channel, i.e. when the connection of the channel to the dot transmits a single transport mode only. We explain this finding in terms of the Lippmann-Schwinger perturbation theory. We demonstrate that the signature of the weak coupling conditions is the conductance, which for P subbands at the Fermi level varies between P - 1 and P in units of 2e(2)/h. For stronger coupling of the quantum dot to the channel, the G maps resolve the local density of states only for very specific work points, with the Fermi energy coinciding with quasi-bound energy levels.
