Title :
Coarsening dynamics of self-assembled quantum dots with elastic field interactions
Author_Institution :
Dept. of Environ. Technol., Nagoya Inst. of Technol., Japan
Abstract :
Summary form only given. The author discusses the island coarsening process in lattice-mismatched heteroepitaxial systems after the growth has stopped. In this situation, the total volume of islands per unit area (the areal fraction) is conserved during the coarsening, and both the Ostwald ripening mechanism and the misfit strain-induced elastic field interactions among islands are dominant factors. He considers an ensemble of coplanar hemispherical cap-shaped islands on the surface, interacting through surface diffusion and the misfit-induced elastic field. To discuss the coarsening dynamics of self-assembled quantum dots, he has solved numerically the growth equations for a system of 10/sup 4/ interacting islands by changing the elastic interaction strength and the areal fraction.
Keywords :
interface phenomena; internal stresses; island structure; quantum dots; self-assembly; surface diffusion; Ostwald ripening; coarsening dynamics; coplanar hemispherical cap-shaped islands; elastic field interactions; elastic interaction strength; island coarsening process; islands areal fraction; lattice-mismatched heteroepitaxial systems; misfit strain-induced elastic field; self-assembled quantum dots; surface diffusion; Acceleration; Capacitive sensors; Chemical technology; Chemical vapor deposition; Equations; Molecular beam epitaxial growth; Optical devices; Quantum dots; Substrates; US Department of Transportation;
Conference_Titel :
Microprocesses and Nanotechnology Conference, 1999. Digest of Papers. Microprocesses and Nanotechnology '99. 1999 International
Conference_Location :
Yokohama, Japan
Print_ISBN :
4-930813-97-2
DOI :
10.1109/IMNC.1999.797504
