Origin of size distributions in ZnSe self-organized quantum dots grown on ZnS layers

Takehiko Tawara, Satoru Tanaka, Hidekazu Kumano, Ikuo Suemune

研究成果: Contribution to journalArticle査読

抄録

Main factors which determine the size, the standard deviations which show the degree of the size fluctuations for the average dot height and diameter, and density in ZnSe self-organized quantum dots (QDs) grown on ZnS layers were studied. By lowering the growth temperature the QDs average size and its standard deviation decreased and the density increased due to the slower surface migration. With the application of the scaling theory, it was revealed that the normalized size distributions were uniquely determined by the nucleation process although the apparent standard deviations of the QD sizes were dependent on the growth temperature. The influence of surface roughness of the underneath layer on the formation of the relations of the dot height and diameter was also examined. It was shown that the fluctuation of the surface potential contributes significantly to the apparent standard deviations of ZnSe self-organized QDs sizes.

本文言語英語
ページ(範囲)515-519
ページ数5
ジャーナルJournal of Electronic Materials
29
5
DOI
出版ステータス出版済み - 5 2000
外部発表はい

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学
  • 材料化学

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