Growth evolution and magneto-optical characteristics of self-assembled ZnTe/ZnMnSe quantum dots

Ling Lee; Wen Chung Fan; Kun Feng Chien; An Jye Tzou; Wu-Ching Chou

doi:10.1016/j.jcrysgro.2012.11.009

Growth evolution and magneto-optical characteristics of self-assembled ZnTe/ZnMnSe quantum dots

Ling Lee^*, Wen Chung Fan, Kun Feng Chien, An Jye Tzou, Wu-Ching Chou

^*Corresponding author for this work

Department of Electrophysics

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The growth evolution and the magneto-optical characteristics of the self-assembled single-layer ZnTe/ZnMnSe quantum dots grown by molecular beam epitaxy were investigated. As the ZnTe coverage is above 2.0 monolayers, a Stranski-Krastanov growth process is observed with a significantly increased dot density on top of two-dimensional plateaus. As the coverage exceeds 2.7 monolayers, ripened dots dominate instead. Furthermore, a saturated degree of circular polarization of 76% at applied magnetic field of 4 T and the formation of magnetic polarons with a formation time of 7.4 ns were demonstrated.

Original language	English
Pages (from-to)	222-225
Number of pages	4
Journal	Journal of Crystal Growth
Volume	378
DOIs	https://doi.org/10.1016/j.jcrysgro.2012.11.009
State	Published - 1 Jan 2013

Keywords

Magneto-optic materials
Molecular beam epitaxy
Nanostructures
Zinc compounds

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title = "Growth evolution and magneto-optical characteristics of self-assembled ZnTe/ZnMnSe quantum dots",

abstract = "The growth evolution and the magneto-optical characteristics of the self-assembled single-layer ZnTe/ZnMnSe quantum dots grown by molecular beam epitaxy were investigated. As the ZnTe coverage is above 2.0 monolayers, a Stranski-Krastanov growth process is observed with a significantly increased dot density on top of two-dimensional plateaus. As the coverage exceeds 2.7 monolayers, ripened dots dominate instead. Furthermore, a saturated degree of circular polarization of 76% at applied magnetic field of 4 T and the formation of magnetic polarons with a formation time of 7.4 ns were demonstrated.",

keywords = "Magneto-optic materials, Molecular beam epitaxy, Nanostructures, Zinc compounds",

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AU - Lee, Ling

AU - Fan, Wen Chung

AU - Chien, Kun Feng

AU - Tzou, An Jye

AU - Chou, Wu-Ching

PY - 2013/1/1

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N2 - The growth evolution and the magneto-optical characteristics of the self-assembled single-layer ZnTe/ZnMnSe quantum dots grown by molecular beam epitaxy were investigated. As the ZnTe coverage is above 2.0 monolayers, a Stranski-Krastanov growth process is observed with a significantly increased dot density on top of two-dimensional plateaus. As the coverage exceeds 2.7 monolayers, ripened dots dominate instead. Furthermore, a saturated degree of circular polarization of 76% at applied magnetic field of 4 T and the formation of magnetic polarons with a formation time of 7.4 ns were demonstrated.

AB - The growth evolution and the magneto-optical characteristics of the self-assembled single-layer ZnTe/ZnMnSe quantum dots grown by molecular beam epitaxy were investigated. As the ZnTe coverage is above 2.0 monolayers, a Stranski-Krastanov growth process is observed with a significantly increased dot density on top of two-dimensional plateaus. As the coverage exceeds 2.7 monolayers, ripened dots dominate instead. Furthermore, a saturated degree of circular polarization of 76% at applied magnetic field of 4 T and the formation of magnetic polarons with a formation time of 7.4 ns were demonstrated.

KW - Magneto-optic materials

KW - Molecular beam epitaxy

KW - Nanostructures

KW - Zinc compounds

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