growth on Zn(Cd)Te surface and magneto-photoluminescence

Self-organized dots of CdTe and Cd1−xMnxTe (x=0.06) were fabricated on the Zn1−yCdyTe (1 0 0) surface by MBE. The dot formation on ZnTe was not different between CdTe and Cd1−xMnxTe but different features appeared with the increase of y. In CdTe dots, the density was decreased continuously with y and the size was increased, in qualitative accordance with the decrease of the lattice mismatch ratio between CdTe and Zn1−yCdyTe. On the other hand, the dot formation of Cd1−xMnxTe dots was little dependent on y; the density was almost constant and the size was increased to only a little extent. In photoluminescence (PL) measurements on capped dots, the energies of the excitonic emission were red-shifted with y in both CdTe and Cd1−xMnxTe dots. The PL spectra from Cd1−xMnxTe quantum dots showed well-defined splitting into two lines at low temperatures less than View the MathML source and it was found that the Zeeman shift of the two lines was much different.