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

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4 Scopus Citations


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 languageAmerican English
Pages (from-to)2209-2212
Number of pages4
JournalJapanese Journal of Applied Physics, Part 2: Letters
Issue number4
StatePublished - 2008

NREL Publication Number

  • NREL/JA-520-43470


  • 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


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