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Designing spatial correlation of quantum dots: towards self-assembled three-dimensional structures

Bortoleto, J. R. R. and Zelcovit, J. G. and Gutiérrez, H. R. and Bettini, J. and Cotta, M. A. (2008) Designing spatial correlation of quantum dots: towards self-assembled three-dimensional structures. NANOTECHNOLOGY, 19 (1).

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Official URL: http://www.iop.org/EJ/abstract/0957-4484/19/1/0156...

Abstract

Buried two-dimensional arrays of InP dots were used as a template for the lateral ordering of self-assembled quantum dots. The template strain field can laterally organize compressive (InAs) as well as tensile (GaP) self-assembled nanostructures in a highly ordered square lattice. High-resolution transmission electron microscopy measurements show that the InAs dots are vertically correlated to the InP template, while the GaP dots are vertically anti-correlated, nucleating in the position between two buried InP dots. Finite InP dot size effects are observed to originate InAs clustering but do not affect GaP dot nucleation. The possibility of bilayer formation with different vertical correlations suggests a new path for obtaining three-dimensional pseudocrystals.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nanoelectronics
Physical Science > Quantum phenomena
Material Science > Nanostructured materials
Physical Science > Photonics
ID Code:6325
Deposited By:IoN
Deposited On:09 Dec 2009 11:01
Last Modified:09 Dec 2009 11:01

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