Journal ArticleDOI
Self-organization in growth of quantum dot superlattices.
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TLDR
The growth of multilayer arrays of coherently strained islands self-organizes into a more regular three-dimensional arrangement, providing a possible route to obtain the size uniformity needed for electronic applications of quantum dot arrays.Abstract:
We investigate the growth of multilayer arrays of coherently strained islands, which may serve as ``quantum dots'' in electronic devices. A simple model reproduces the observed vertical correlation between islands in successive layers. However, the arrangement of islands is not simply repeated from layer to layer. Instead, the island size and spacing grow progressively more uniform. In effect, the structure ``self-organizes'' into a more regular three-dimensional arrangement, providing a possible route to obtain the size uniformity needed for electronic applications of quantum dot arrays.read more
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X-ray diffraction and optical characterization of interdiffusion in self-assembled InAs/GaAs quantum-dot superlattices
TL;DR: In this paper, a dynamical theory is employed to simulate the measured x-ray diffraction rocking curves of the InAs/GaAs quantum-dot superlattices annealed at different temperatures.
Journal ArticleDOI
Pyramidal Structure Formation at the Interface between III/V Semiconductors and Silicon
Andreas Beyer,Andreas Stegmüller,J. O. Oelerich,K. Jandieri,Katharina Werner,Gerson Mette,Wolfgang Stolz,S. D. Baranovskii,Ralf Tonner,Kerstin Volz +9 more
TL;DR: In this article, it is shown how a pyramidal interface structure is formed irrespective of the conditions applied during the growth of two semiconductors, and it is proven by first-principles computations and kinetic modeling that the atom mobility during growth and the chemical environment at the interface are the decisive factors in the formation of the actual structure.
Journal ArticleDOI
Laterally aligned quantum rings: From one-dimensional chains to two-dimensional arrays
Jiang Wu,Zhiming Wang,Kyland Holmes,Euclydes Marega,Zhihua Zhou,Handong Li,Yuriy I. Mazur,Gregory J. Salamo +7 more
TL;DR: In this paper, the fabrication of ordered quantum rings by the conversion of partially capped quantum dots is demonstrated by partially capping self-assembled quantum dots on high index surfaces by this growth technique.
Journal ArticleDOI
Design of Nanostructure Complexes by Droplet Epitaxy
TL;DR: In this paper, a number of unseen self-assembled nanostructure complexes fabricated on various GaAs surface indexes by droplet epitaxy were demonstrated by the morphology evolution of nanostructures.
Journal ArticleDOI
Quantum box size effect on vertical self-alignment studied using cross-sectional scanning tunneling microscopy
Bernard Legrand,J.P. Nys,Bruno Grandidier,D. Stievenard,Aristide Lemaître,Jean-Michel Gérard,V. Thierry-Mieg +6 more
TL;DR: In this paper, the alignment probability between two sets of quantum boxes depends strongly on the spacer layer thickness Zs and the size of the boxes, and the results are interpreted using a theoretical two-dimensional model.