Morphological transformation of InyGa1-yAs islands, fabricated by Stranski-Krastanov growth

A. Lorke, R. Blossey, J. M. Garcia, M. Bichler, G. Abstreiter

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

A remarkable change in topology occurs when InyGa 1-yAs quantum dots, grown by Stranski-Krastanov self-organization, are covered by a thin layer of GaAs. The nano-islands rearrange themselves to form volcano-like islands with distinct, ring-like features. The island topology can be preserved during overgrowth and thus used for the fabrication of ring-shaped quantum structures. The experimental data suggests that two mechanisms, diffusion and dewetting, are driving the transformation from dots to rings.

Original languageEnglish
Pages (from-to)225-229
Number of pages5
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume88
Issue number2-3
DOIs
StatePublished - 16 Jan 2002

Keywords

  • Dots
  • Island
  • Rings
  • Self-organized
  • Stranski-Krastanov
  • Transformation

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