2024-03-29T11:13:38Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/291542017-02-27T16:48:17Zcom_10261_90com_10261_4col_10261_343
Excitons in self-assembled quantum ring-like structures
Pettersson, H.
Warburton, Richard J.
Lorke, Axel
Karrai, Khaled
Kotthaus, Jörg P.
García Martínez, Jorge Manuel
Petroff, Pierre M.
Self-assembly
Quantum dots
Rings
5 páginas, 2 figuras.-- PACS: 73.20.Dx; 71.35.−y; 73.40.Rw; 78.66.Fd.-- Trabajo presentado en el 13th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS), Otawa del 1 al 6 de 1999.
A remarkable morphological change of self-assembled InAs quantum dots takes place during growth if a pause is introduced after overgrowing the dots with a few nm of GaAs. Atomic force microscopy indicates that the shape of the dots changes lens-like to ring-like. We report here the results of capacitance and interband transmission experiments on such ring-like structures embedded in a GaAs matrix. In particular, we compare the electronic properties of conventional dots with those of the rings. Significant changes are found which qualitatively support a quantum ring model.
One of the authors (H.P.) would like to thank the Alexander von Humboldt foundation for financial support and the group at LMU for their hospitality. This work is supported by the Deutsche Forschungsgemeinschaft (SFB 348).
Peer reviewed
2010-11-17T09:17:09Z
2010-11-17T09:17:09Z
2000-02
preprint
http://purl.org/coar/resource_type/c_816b
Physica E 6(1-4): 510-513 (2000)
1386-9477
http://hdl.handle.net/10261/29154
10.1016/S1386-9477(99)00096-X
en
Preprint
http://dx.doi.org/10.1016/S1386-9477(99)00096-X
open
Elsevier