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Elastic Energy Relaxation in Buried Quantum Dots

Published online by Cambridge University Press:  01 February 2011

Vladimir V Chaldyshev ,
Anna L. Kolesnikova  and
Alexei E. Romanov
Vladimir V Chaldyshev
Affiliation:
[email protected], Ioffe Physico-Technical Institute, RAS, Solid State Electronics, Polytechnicheskaya 26, St. Petersburg, N/A, Russian Federation
Anna L. Kolesnikova
Affiliation:
[email protected], Institute of Problems of Mechanical Engineering, St. Petersburg, N/A, Russian Federation
Alexei E. Romanov
Affiliation:
[email protected], Ioffe Institute, St. Petersburg, N/A, Russian Federation
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Abstract

We theoretically analyze three models, which correspond to three different ways of the elastic energy relaxation in buried quantum dots. The first model considers formation of a pair of prismatic dislocation loops. One of them lies on dot/matrix interface, whereas the other is a satellite and locates in the adjacent matrix. The second model also includes the satellite loop and differs from the first one by non-local reduction of the dot plastic distortion. The origin of the satellite loop is the materials conservation requirement. The third model considers the case when this requirement is violated and only the misfit dislocation loop is formed. We determine the critical radii of the dots and loops, as well as the dependence of the satellite loop size on the dot size. The model calculation are compared to the relevant experimental data.

Keywords

nanostructuredislocationsdefects
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 959: Symposium M – Quantum Dots—Growth, Behavior and Applications , 2006 , 0959-M09-05
Copyright
Copyright © Materials Research Society 2007

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References

REFERENCES

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