Transformation of GaAs (0 0 1)-(1 1 1)B facet structure by surface diffusion during molecular beam epitaxy on patterned substrates

S. Koshiba, Y. Nakamura, T. Noda, S. Watanabe, H. Akiyama, H. Sakaki

Research output: Contribution to journalConference article

5 Citations (Scopus)

Abstract

The mechanisms of molecular beam epitaxy growth on the mesa patterned substrates which results in the formation of sharp ridge structure were investigated. A simple model, based on the scanning electron microscope measurements, nicely explains the time dependent growth rates as well as the change of the facet shape during the formation of ridge structure originating from the strong Ga atoms migration. The estimated number of atoms crossing the boundary changes according to the alternating facet shape and this indicates the instability in the facet growth. As a result, the mechanism of mesa growth was clarified, which becomes self-regulatory while the facet shape and/or the boundary condition vary as the growth progresses.

Original languageEnglish
Pages (from-to)62-66
Number of pages5
JournalJournal of Crystal Growth
Volume227-228
DOIs
Publication statusPublished - 2001 Jul 1
Externally publishedYes
Event11th International Conference on Molecular Beam Epitaxy - Bijing, China
Duration: 2000 Sep 112000 Sep 15

Keywords

  • Diffusion
  • Facet structure
  • Growth
  • MBE

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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