Abstract
Self-organized quantum dots (QDs) of Cd 1− x Mn x Te were successfully grown on the ZnTe(1 0 0) surface by atomic layer epitaxy. Atomic force microscope (AFM) measurement revealed the dot formation in a high density on the surface of 3.5-monolayer-thick Cd 1− x Mn x Te when the Mn composition x was less than 10%. The typical dot size was 20 nm in diameter and 2 nm in height. The density of dots ranged from 4×10 10 to 10 11 cm −2 for x=0–10%, but it decreased abruptly when x was more than 10%. In photoluminescence (PL) measurements for capped QDs, excitonic luminescence from QDs was observed at 2.16–2.27 eV depending on the Mn composition. One of the features of PL spectra from QDs containing Mn is that the spectra are composed of two PL lines with a separation of 20–26 meV.
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