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Memorias de investigación
Artículos en revistas:
General route for the decomposition of InAs quantum dots during the capping process
Año:2016
Áreas de investigación
  • Tecnología electrónica y de las comunicaciones
Datos
Descripción
The effect of the capping process on the morphology of InAs/GaAs quantum dots (QDs) by using different GaAs-based capping layers (CLs), ranging from strain reduction layers to strain compensating layers, has been studied by transmission microscopic techniques. For this, we have measured simultaneously the height and diameter in buried and uncapped QDs covering populations of hundreds of QDs that are statistically reliable. First, the uncapped QD population evolves in all cases from a pyramidal shape into a more homogenous distribution of buried QDs with a spherical-dome shape, despite the different mechanisms implicated in the QD capping. Second, the shape of the buried QDs depends only on the ?nal QD size, where the radius of curvature is function of the base diameter independently of the CL composition and growth conditions. An asymmetric evolution of the QDs? morphology takes place, in which the QD height and base diameter are modi?ed in the amount required to adopt a similar stable shape characterized by a averaged aspect ratio of 0.21. Our results contradict the traditional model of QD material redistribution from the apex to the base and point to a different universal behavior of the overgrowth processes in self-organized InAs QDs.
Internacional
Si
JCR del ISI
Si
Título de la revista
Nanotechnology
ISSN
0957-4484
Factor de impacto JCR
3,573
Información de impacto
Datos JCR del año 2015
Volumen
27
DOI
10.1088/0957-4484/27/12/125703
Número de revista
Desde la página
125703:1
Hasta la página
125703:8
Mes
SIN MES
Ranking
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Participantes
  • Autor: D. González (UCA)
  • Autor: D.F. Reyes (UCA)
  • Autor: Antonio David Utrilla Lomas (UPM)
  • Autor: T. Ben (UCA)
  • Autor: V. Braza (UCA)
  • Autor: Alvaro de Guzman Fernandez Gonzalez (UPM)
  • Autor: Adrian Hierro Cano (UPM)
  • Autor: Jose Maria Ulloa Herrero (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Departamento: Ciencia de Materiales
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