Modulated structures and atomic ordering in InPySb1-y layers grown by organometallic vapor phase epitaxy

Tae Yeon Seong, G. Roger Booker, Andrew G. Norman, Gerald B. Stringfellow

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Modulated structure in organometallic vapour phase epitaxially grown InPSb(001) layers has been investigated using transmission electron microscopy (TEM) and transmission electron diffraction (TED). TEM results show that a fine scale modulated contrast (15-20nm) and a fine scale speckled contrast (∼5 nm) are simultaneously present. In addition, a fine needle-like contrast (∼1.5-2.1 nm) is present. TED patterns show that (1̄11) and (11̄1) CuPt-type ordered variants are present. Diffuse streaks along the [110] direction are also observed in the [1̄10] TED pattern and found to be associated with the needle-like contrast. A possible model involving segregation of atoms associated with rows of missing dimers in the surface reconstruction or the presence of antiphase boundaries (APBs) and domain boundaries in CuPt-type ordered regions present in the layers is suggested to explain the origin of the needle-like contrast.

Original languageEnglish
Pages (from-to)2209-2212
Number of pages4
JournalJapanese Journal of Applied Physics
Volume47
Issue number4 PART 1
DOIs
Publication statusPublished - 2008 Apr 18

Keywords

  • Atomic ordering
  • Fine scale modulated contrast
  • III-V compound semiconductors
  • InPSb
  • Needle-like contrast
  • Organometallic vapor phase epitaxy
  • Speckled contrast
  • Spinodal decomposition
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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