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Título

Magnetotunneling spectroscopy of ring-shaped (InGa)As quantum dots: Evidence of excited states with 2pz character

AutorWalker, D.; Pulizzi, F.; Patanè, A.; Eaves, Laurence; Granados, Daniel CSIC ORCID; García Martínez, Jorge Manuel CSIC ORCID CVN ; Henini, M.; Rudenkov, V. V.; Christianen, P.C.M.; Maan, J. C.; Offermans, P.; Koenraad, P. M.; Hill, G.
Palabras claveQuantum dot
Magnetotunneling
Quantum ring
Fecha de publicaciónmay-2006
EditorElsevier
CitaciónPhysica E 32(1-2): 57-60 (2006)
ResumenWe study the effect of a high magnetic field (B) on the current–voltage characteristics, I(V), of a GaAs/(AlGa)As resonant tunneling diode incorporating a layer of ring-shaped quantum dots (QDs) in the quantum well (QW). The dots give rise to a series of four unusual resonances in I(V) which show a high degree of reproducibility across the epitaxial wafer. By combining data for B parallel and perpendicular to the growth axis z, we identify that the unusual resonances arise from resonant tunneling into QD excited states with 2pz-like symmetry. The two series of magneto-oscillations in I for Bz allow us to determine the resonant charging and discharging of the QW with varying bias.
Descripción4 páginas, 3 figuras.-- PACS: 73.23. b; 73.63.Kv; 73.40.Gk.-- Proceedings of the 12th International Conference on Modulated Semiconductor Structures (ICPS-12).
Versión del editorhttp://dx.doi.org/10.1016/j.physe.2005.12.014
URIhttp://hdl.handle.net/10261/31978
DOI10.1016/j.physe.2005.12.014
ISSN1386-9477
Aparece en las colecciones: (IMN-CNM) Artículos

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