Quantitative study of Cd atoms distribution in CdTe/ZnTe quantum dots superlattice by HRTEM
|Slawomir Kret 1, Piotr Traczykowski 2, Piotr Dłużewski 1, Pierre Ruterana 3, Paweł Dłużewski 2, Marcin Żak 1, A. Szczepańska 1, S Maćkowski 1, Grzegorz Karczewski 1|
1. Polish Academy of Sciences, Institute of Physics, al. Lotników 32/46, Warszawa 02-668, Poland
We investigated the CdTe/ZnTe stacked Quantum Dots (QD) superlattice by High Resolution Transmission Electron Microscopy (HRTEM). In the superlattice with 2 ML thick CdTe layer separated by 15 ML thick ZnTe spacer zones of autocorrelation arrangement of QDs was observed on cross-sectional samples . In the plane-view images of single QDs layer taken in <001> zone axis , it can be noticed that the islands have an asymmetric ellipsoid shape along the  and  directions, the two axis being 6-7nm and 3-4 nm in magnitude respectively and that their heights are below 1.5 nm. The measured strain ε component suggests the existence of a composition gradient in the lateral as well as in the vertical directions.
Presentation: poster at E-MRS Fall Meeting 2004, Symposium D, by Slawomir Kret
See On-line Journal of E-MRS Fall Meeting 2004
Submitted: 2004-08-03 17:03 Revised: 2009-06-08 12:55
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