Formation of self-organized In0.5Ga0.5As quantum dots on GaAs by molecular beam epitaxy

Jen Inn Chyi, Tzer En Nee, Ching Ting Lee, Jia Lin Shieh, Jen Wei Pan

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Self-organized In0.5Ga0.5As quantum dots have been successfully grown on vicinal GaAs substrates by molecular beam epitaxy. The density of the quantum dots can be changed by nucleating the dots under different As overpressure. Substrate tilt angle of 15° results in much larger dot size and density than that of 4° due to the closely spaced step edges on the surface. Through investigations of the dots grown on In0.1Ga0.9As buffer, the strain energy of the buffer layer is also found to be an important factor that affects the size and density of the quantum dots.

Original languageEnglish
Pages (from-to)777-781
Number of pages5
JournalJournal of Crystal Growth
Volume175-176
Issue numberPART 2
DOIs
Publication statusPublished - 1997 May

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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