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Optical properties of a tip-induced quantum dot

. We have performed optical spectroscopy measurements on a STM-tip-induced quantum dot in a GaAs layer. The dominant confinement in the (hole) quantum dot is found to be in the direction parallel to the tip axis. Electron confinement is achieved by a sub-surface AlGaAs barrier. Current-dependent mea...

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Hauptverfasser: Kemerink, Martijn (VerfasserIn) , Sauthoff, K. (VerfasserIn) , Koenraad, Paulus M. (VerfasserIn) , Gerritsen, J. W. (VerfasserIn) , van Kempen, H. (VerfasserIn) , Fomin, Vladimir M. (VerfasserIn) , Wolter, Joachim H. (VerfasserIn) , Devreese, Jozef T. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 11 April 2001
In: Applied physics. A, Materials science & processing
Year: 2001, Jahrgang: 72, Pages: S239-S242
ISSN:1432-0630
DOI:10.1007/s003390100668
Online-Zugang:Verlag, Volltext: https://doi.org/10.1007/s003390100668
Volltext
Verfasserangaben:M. Kemerink, K. Sauthoff, P.M. Koenraad, J.W. Gerritsen, H. van Kempen, V.M. Fomin, J.H. Wolter, J.T. Devreese
Beschreibung
Zusammenfassung:. We have performed optical spectroscopy measurements on a STM-tip-induced quantum dot in a GaAs layer. The dominant confinement in the (hole) quantum dot is found to be in the direction parallel to the tip axis. Electron confinement is achieved by a sub-surface AlGaAs barrier. Current-dependent measurements indicate that many-body interactions can cause spectral blueshifts up to 75 meV for a tunneling current of 10 nA. Consequently, a full treatment of the many-body problem is required for an accurate description of this type of system.
Beschreibung:Gesehen am 12.12.2019
Beschreibung:Online Resource
ISSN:1432-0630
DOI:10.1007/s003390100668

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