Electronic and excitonic properties of self-assembled semiconductor quantum rings

Fomin Vladimir; Gladilin Vladimir; Devreese Josef T.; Blokland Janneke H.; Christianen Peter C.M.; Maan Jan Cornelius; Taboada Alfonso Gonzalez; Granados Daniel; Garcia Jorge M.; Kleemans N. A.J.M.; Van Genuchten H. C.M.; Bozkurt Murat; Koenraad Paul M.

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FOMIN, Vladimir, GLADILIN, Vladimir, DEVREESE, Josef T., BLOKLAND, Janneke H., CHRISTIANEN, Peter C.M., MAAN, Jan Cornelius, TABOADA, Alfonso Gonzalez, GRANADOS, Daniel, GARCIA, Jorge M., KLEEMANS, N. A.J.M., VAN GENUCHTEN, H. C.M., BOZKURT, Murat, KOENRAAD, Paul M.. Electronic and excitonic properties of self-assembled semiconductor quantum rings. In: Proceedings of SPIE - The International Society for Optical Engineering, Ed. 4, 4-6 mai 2009, Dresden. Bellingham, Washington: SPIE, 2009, Ediţia 4, Vol.7364, pp. 1-12. ISBN 9780819476388 . ISSN 0277786X. DOI: https://doi.org/10.1117/12.822607

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Proceedings of SPIE - The International Society for Optical Engineering
Ediţia 4, Vol.7364, 2009

Conferința " Nanotechnology"
4, Dresden, Germania, 4-6 mai 2009

Electronic and excitonic properties of self-assembled semiconductor quantum rings

DOI:https://doi.org/10.1117/12.822607

Pag. 1-12

Fomin Vladimir¹²³⁴, Gladilin Vladimir²⁴⁵, Devreese Josef T.²³, Blokland Janneke H.⁶, Christianen Peter C.M.⁶, Maan Jan Cornelius⁶, Taboada Alfonso Gonzalez⁷, Granados Daniel⁷, Garcia Jorge M.⁷, Kleemans N. A.J.M.³, Van Genuchten H. C.M.³, Bozkurt Murat³, Koenraad Paul M.³

¹ Duisburg - Essen University,
² University of Antwerp,
³ Eindhoven University of Technology,
⁴ Moldova State University,
⁵ Catholic University of Leuven (KU Leuven),
⁶ High Field Magnet Laboratory, Institute for Molecules and Materials, Radboud University,
⁷ Microelectronics Institute of Madrid

Disponibil în IBN: 30 noiembrie 2023

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Rezumat

Theoretical analysis of the electron energy spectrum and the magnetization in a strained In_xGa_1-xAs/GaAs selfassembled quantum ring (SAQR) is performed using realistic parameters, determined from the cross-sectional scanning-tunneling microscopy characterization. The Aharonov-Bohm oscillations in the persistent current have been observed in low temperature magnetization measurements on these SAQRs. The effect of the Coulomb interaction on the energy spectra of SAQRs is studied for rings with two electrons and with an exciton. Our analysis of the photoluminescence spectrum in magnetic fields up to 30 T shows that the excitonic properties strongly depend on the anisotropic shape, size, composition and strain of the SAQRs and is in a good agreement with the experimental data

Cuvinte-cheie
Aharonov-Bohm effect, magnetization, persistent currents, photoluminescence, Self-assembled semiconductor quantum rings