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

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 g...

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Detalhes bibliográficos
Autores: Pulizzi, F., Walker, D., Patanè, A., Eaves, Laurence, 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.
Tipo de documento: artigo
Data de publicação:2005
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/19172
Acesso em linha:http://hdl.handle.net/10261/19172
Access Level:Acceso aberto
Palavra-chave:Quantum dots
Quantum well
Descrição
Resumo: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.

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