Self-organized formation processes of CdSe quantum dots studied by reflection high-energy electron diffraction

Kenta Arai, Takashi Hanada, Takafumi Yao

Research output: Contribution to journalConference articlepeer-review

6 Citations (Scopus)

Abstract

Initial stages of the growth of CdSe layers on ZnSe and formation processes of CdSe quantum dots (QDs) are studied by in situ reflection high-energy electron diffraction (RHEED). The growth process of the CdSe layer at the initial stage is divided into five stages: (1) stable two-dimensional (2D) growth, (2) metastable 2D growth, (3) metastable growth just before the onset of QD formation, (4) QD formation, and (5) coalescence of QDs. There is a critical growth stage at which the formation of QDs is initiated. It is demonstrated by the RHEED investigation that the formation of the QD is associated with the release of strain energy. Because the strain energy stored in the dislocation-free 2D layer cannot be fully released as long as the surface is flat, in order to decrease the strain energy, the development of the islands occurs, competing with smaller increase of the surface energy.

Original languageEnglish
Pages (from-to)703-706
Number of pages4
JournalJournal of Crystal Growth
Volume214
DOIs
Publication statusPublished - 2000 Jun 2
EventThe 9th International Conference on II-VI Compounds - Kyoto, Jpn
Duration: 1999 Nov 11999 Nov 5

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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