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

doi:10.1143/JJAP.47.2209

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

Materials Science

Research output: Contribution to journal › Article › peer-review

4 Scopus Citations

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 language	American English
Pages (from-to)	2209-2212
Number of pages	4
Journal	Japanese Journal of Applied Physics, Part 2: Letters
Volume	47
Issue number	4
DOIs	https://doi.org/10.1143/JJAP.47.2209 https://doi.org/10.1143/JJAP.47.2209
State	Published - 2008

NREL Publication Number

NREL/JA-520-43470

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

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title = "Modulated Structures and Atomic Ordering in InPySb1-y Layers Grown by Organometallic Vapor Phase Epitaxy",

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 ({\=1}11) and (1{\=1}1) CuPt-type ordered variants are present. Diffuse streaks along the [110] direction are also observed in the [{\=1}10] 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.",

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",

author = "Seong, {Tae Yeon} and Booker, {G. Roger} and Norman, {Andrew G.} and Stringfellow, {Gerald B.}",

year = "2008",

doi = "10.1143/JJAP.47.2209",

language = "American English",

volume = "47",

pages = "2209--2212",

journal = "Japanese Journal of Applied Physics, Part 2: Letters",

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T1 - Modulated Structures and Atomic Ordering in InPySb1-y Layers Grown by Organometallic Vapor Phase Epitaxy

AU - Seong, Tae Yeon

AU - Booker, G. Roger

AU - Norman, Andrew G.

AU - Stringfellow, Gerald B.

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

KW - Atomic ordering

KW - Fine scale modulated contrast

KW - III-V compound semiconductors

KW - InPSb

KW - Needle-like contrast

KW - Organometallic vapor phase epitaxy

KW - Speckled contrast

KW - Spinodal decomposition

KW - Transmission electron microscopy

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M3 - Article

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SN - 0021-4922

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EP - 2212

JO - Japanese Journal of Applied Physics, Part 2: Letters

JF - Japanese Journal of Applied Physics, Part 2: Letters

IS - 4

ER -

Modulated Structures and Atomic Ordering in InPySb1-y Layers Grown by Organometallic Vapor Phase Epitaxy

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Keywords

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