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Self Assembled PbSe Quantum Dots with Almost Equal Sizes Grown by MBE on PbTe/Si(111)

Published online by Cambridge University Press:  11 February 2011

Karim Alchalabi ,
Dmitri Zimin  and
Hans Zogg
Karim Alchalabi
Affiliation:
Thin Film Physics Group, Swiss Federal Institute of Technology, CH-8005 Zurich, Switzerland, zogg@phys.ethz.chhttp://www.tfp.ethz.ch, phone +41 1 445 14 80, fax +41 1 445 1499
Dmitri Zimin
Affiliation:
Thin Film Physics Group, Swiss Federal Institute of Technology, CH-8005 Zurich, Switzerland, zogg@phys.ethz.chhttp://www.tfp.ethz.ch, phone +41 1 445 14 80, fax +41 1 445 1499
Hans Zogg
Affiliation:
Thin Film Physics Group, Swiss Federal Institute of Technology, CH-8005 Zurich, Switzerland, zogg@phys.ethz.chhttp://www.tfp.ethz.ch, phone +41 1 445 14 80, fax +41 1 445 1499
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Abstract

We report on PbSe QDs grown on a few μm thick PbTe(111) layers on Si(111). The QDs form as pyramids with three (100) side faces and (111) base. Their sizes are almost equal, the standard deviation of their heights can be as low as 2–3%. This seems to be the narrowest distribution ever observed for self assembled QDs. Similar QDs of PbSe have first been described by Pinczolits et al. (Appl. Phys. Lett. 73, 250, 1998). These authors used cleaved BaF2 as a substrate, they observed two types of dots with somewhat wider size distributions. The results are compared and explained on the basis of nucleation and growth theories.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 737 , 2002 , E5.5
Copyright
Copyright © Materials Research Society 2003

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References

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