Optical properties of a tip-induced quantum dot
2001 (English)In: Applied Physics A: Materials Science & Processing, ISSN 0947-8396, E-ISSN 1432-0630, Vol. 72, S239-S242 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
Springer Verlag (Germany) , 2001. Vol. 72, S239-S242 p.
IdentifiersURN: urn:nbn:se:liu:diva-118223DOI: 10.1007/s003390100668ISI: 000205435300021OAI: oai:DiVA.org:liu-118223DiVA: diva2:813323