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Título: | Excitons in self-assembled quantum ring-like structures |
Autor: | Pettersson, H.; Warburton, Richard J.; Lorke, Axel; Karrai, Khaled; Kotthaus, Jörg P.; García Martínez, Jorge Manuel CSIC ORCID CVN ; Petroff, Pierre M. | Palabras clave: | Self-assembly Quantum dots Rings |
Fecha de publicación: | feb-2000 | Editor: | Elsevier | Citación: | Physica E 6(1-4): 510-513 (2000) | Resumen: | 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. | Descripción: | 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. | Versión del editor: | http://dx.doi.org/10.1016/S1386-9477(99)00096-X | URI: | http://hdl.handle.net/10261/29154 | DOI: | 10.1016/S1386-9477(99)00096-X | ISSN: | 1386-9477 |
Aparece en las colecciones: | (IMSE-CNM) Artículos |
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