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Self-organized quantum dots of diluted magnetic semiconductors Cd1−xMnxTe by Shinji Kuroda; Yoshikazu Terai; Kôki Takita; Tadashi Takamasu; Giyuu Kido; Nobumasa Hasegawa; Takashi Kuroda; Fujio Minami is a scholarly article available to read on EtoBox.

What is Self-organized quantum dots of diluted magnetic semiconductors Cd1−xMnxTe about?

Magneto-optical studies on self-organized quantum dots (QDs) of Cd \V Mn V Te were reported. Cd \V Mn V Te QDs with Mn composition less than 10% were grown successfully on the ZnTe(1 0 0) surface by atomic layer epitaxy. A typical dot size of 20 nm in diameter and 2 nm in height and density of the order of 10 cm\ were con"rmed by atomic force microscope (AFM) measurement. In photoluminescence (PL) measurements on capped QDs, the excitonic emission from Cd \V Mn V Te dots was observed but the spectra were composed of two lines with a separation of 20}26 meV at low temperatures. In the dependence on the temperature, the excitation intensity and the magnetic "eld, the PL line at the lower-energy side exhibited peculiar behaviors, compared to that in the higher-energy side \* rapid quenching with an increase of temperature up to 20 K, much smaller Zeeman shift under magnetic "elds, and the saturation of the circular polarization at low magnetic "elds. These features of the lower-energy line were discussed in relation to the excitonic magnetic polaron in QDs. Preliminary results of time-resolved PL and spatial-resolved PL using the far-"eld microscope are also shown.

Author

Shinji Kuroda; Yoshikazu Terai; Kôki Takita; Tadashi Takamasu; Giyuu Kido; Nobumasa Hasegawa; Takashi Kuroda; Fujio Minami

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-0248)

Published

2000

Language

EN