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Excited states of ring-shaped (InGa)As quantum dots in a GaAs∕(AlGa)As quantum well

AuthorsPulizzi, F.; Walker, D.; Patanè, A.; Eaves, L.; Henini, M.; Granados, Daniel ; García Martínez, Jorge Manuel ; Rudenkov, V. V.; Christianen, P. C. M.; Maan, J. C.; Offermans, P.; Koenraad, P. M.; Hill, G.
KeywordsQuantum dots
Quantum well
Issue Date2-Aug-2005
PublisherAmerican Physical Society
CitationPhysical Review B 72, 085309 (2005)
AbstractBy studying the resonant tunneling of electrons through self-assembled ring-shaped (InGa)As quantum dots embedded in the quantum well of an (AlGa)As/GaAs/ (AlGa)As heterostructure, we find evidence for the existence of excited states of the quantum dots which exhibit a 2pz-like character along the growth direction z. The states are investigated by magnetotunneling spectroscopy with magnetic fields applied parallel and perpendicular to z.
Publisher version (URL)http://link.aps.org/doi/10.1103/PhysRevB.72.085309
Appears in Collections:(IMN-CNM) Artículos
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