Self-organized quantum dots of Cd1−xMnxTe : MBE growth on Zn(Cd)Te surface and magneto-photoluminescence

✍ Scribed by Shinji Kuroda; Nobutaka Umakoshi; Yoshikazu Terai; Kôki Takita

• Publisher: Elsevier Science
• Year: 2001
• Tongue: English
• Weight: 254 KB
• Volume: 10
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/s1386-9477(01)00115-1

✦ Synopsis

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 di erent between CdTe and Cd1-xMnxTe but di erent 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-deÿned splitting into two lines at low temperatures less than 10 K and it was found that the Zeeman shift of the two lines was much di erent.