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

Authors:Pulizzi, F.
Walker, D.
Patanè, A.
Eaves, L.
Henini, M.
Granados, Daniel
García, Jorge M.
Rudenkov, V. V.
Christianen, P. C. M.
Maan, J. C.
Offermans, P.
Koenraad, P. M.
Hill, G.
Keywords:Quantum dots, Quantum well
Issue Date:2-Aug-2005
Publisher:American Physical Society
Citation:Physical Review B 72, 085309 (2005)
Abstract:By 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:(IMM-CNM) Artículos

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