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

F. Pulizzi, D. Walker, A. Patane, L. Eaves, M. Henini, D. Granados, J.M. Garcia, V.V. Rudenkov, P.C.M. Christianen, J.C. Maan, P. Offermans, P.M. Koenraad, G. Hill

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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 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 z
Original languageEnglish
Article number85309
Pages (from-to)85309-1/6
Number of pages6
JournalPhysical Review B
Volume72
Issue number8
DOIs
Publication statusPublished - 2005

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