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

Fingerprint

Vapor phase epitaxy
Organometallics
vapor phase epitaxy
Electron diffraction
Needles
Diffraction patterns
needles
antiphase boundaries
electron diffraction
Transmission electron microscopy
Surface reconstruction
Dimers
diffraction patterns
Vapors
transmission electron microscopy
Atoms
dimers
vapor phases
atoms

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)

Cite this

Modulated structures and atomic ordering in InPySb1-y layers grown by organometallic vapor phase epitaxy. / Seong, Tae Yeon; Booker, G. Roger; Norman, Andrew G.; Stringfellow, Gerald B.

In: Japanese Journal of Applied Physics, Vol. 47, No. 4 PART 1, 18.04.2008, p. 2209-2212.

Research output: Contribution to journalArticle

Seong, Tae Yeon ; Booker, G. Roger ; Norman, Andrew G. ; Stringfellow, Gerald B. / Modulated structures and atomic ordering in InPySb1-y layers grown by organometallic vapor phase epitaxy. In: Japanese Journal of Applied Physics. 2008 ; Vol. 47, No. 4 PART 1. pp. 2209-2212.
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