Excited states of ring-shaped (InGa)As quantum dots in a GaAs/(AlGa)As quantum well
- Pulizzi, F.
- Walker, D.
- Patane, A.
- Eaves, L.
- Henini, M.
- Granados, D.
- Garcia, J.M.
- Rudenkov, V.V.
- Christianen, P.C.M.
- Maan, J.C.
- Offermans, P.
- Koenraad, P.M.
- Hill, G.
DOIAbstract
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 2p/sub z/-like character along the growth direction z. The states are investigated by magnetotunneling spectroscopy with magnetic fields applied parallel and perpendicular to
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