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Modeling of Phonon Dispersion in a Semiconductor Quantum Dot Crystal

Published online by Cambridge University Press:  01 February 2011

Olga L. Lazarenkova and
Alexander A. Balandin
Olga L. Lazarenkova
Affiliation:
Department of Electrical Engineering University of California at Riverside Riverside, California 92521
Alexander A. Balandin
Affiliation:
Department of Electrical Engineering University of California at Riverside Riverside, California 92521
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Abstract

We describe a model for numerical calculation of phonon spectrum in a three-dimensional regimented array of semiconductor quantum dots. Regimentation and possibility of carrier mini-band formation make this structure analogous to a crystal, e.g. quantum dot crystal. It is demonstrated that the acoustic phonon dispersion undergoes strong modification in such a structure leading to emergence of low-energy quasi-optical branches. Strong phonon spectrum modification is expected to affect carrier relaxation and transport properties.

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References

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