Ordering-enhanced dislocation glide in III-V alloys

William E. McMahon; Joongoo Kang; Ryan M. France; Andrew G. Norman; Daniel J. Friedman; Su Huai Wei

doi:10.1063/1.4833244

Ordering-enhanced dislocation glide in III-V alloys

William E. McMahon, Joongoo Kang, Ryan M. France, Andrew G. Norman, Daniel J. Friedman, Su Huai Wei

Department of Physics and Chemistry

National Renewable Energy Laboratory

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

17 Scopus citations

Abstract

Ordering-induced effects on dislocations in metallic alloys have been extensively studied due to their importance in technology applications. We demonstrate that dislocation behavior in ordered III-V semiconductor alloys can be drastically different. This is because ordering in bulk metallic alloys is generally stable, whereas the surface-stabilized group-III sublattice ordering of a III-V alloy is only metastable in the bulk. Here, we show that dislocation glide can release some of the energy stored by ordering of III-V alloys, enhancing the glide of any dislocation which cuts through the ordered layers to create an antiphase boundary in the ordering pattern. This leads to an experimentally observed glide-plane switch which is unique to ordered III-V alloys. Implications for other unique strain-relaxation processes in III-V ordered alloys are also discussed.

Original language	English
Article number	203506
Journal	Journal of Applied Physics
Volume	114
Issue number	20
DOIs	https://doi.org/10.1063/1.4833244
State	Published - 28 Nov 2013

Bibliographical note

Funding Information:
This work was supported by the U.S. Department of Energy under Contract No. DE-AC36-08-GO28308 with the National Renewable Energy Laboratory. The authors would also like to acknowledge Waldo Olavarría for the growth of the samples used in this study.

Access to Document

10.1063/1.4833244

Cite this

@article{d637beb6e0bd432cb230915625c86706,

title = "Ordering-enhanced dislocation glide in III-V alloys",

abstract = "Ordering-induced effects on dislocations in metallic alloys have been extensively studied due to their importance in technology applications. We demonstrate that dislocation behavior in ordered III-V semiconductor alloys can be drastically different. This is because ordering in bulk metallic alloys is generally stable, whereas the surface-stabilized group-III sublattice ordering of a III-V alloy is only metastable in the bulk. Here, we show that dislocation glide can release some of the energy stored by ordering of III-V alloys, enhancing the glide of any dislocation which cuts through the ordered layers to create an antiphase boundary in the ordering pattern. This leads to an experimentally observed glide-plane switch which is unique to ordered III-V alloys. Implications for other unique strain-relaxation processes in III-V ordered alloys are also discussed.",

author = "McMahon, {William E.} and Joongoo Kang and France, {Ryan M.} and Norman, {Andrew G.} and Friedman, {Daniel J.} and Wei, {Su Huai}",

note = "Funding Information: This work was supported by the U.S. Department of Energy under Contract No. DE-AC36-08-GO28308 with the National Renewable Energy Laboratory. The authors would also like to acknowledge Waldo Olavarr{\'i}a for the growth of the samples used in this study.",

year = "2013",

month = nov,

day = "28",

doi = "10.1063/1.4833244",

language = "English",

volume = "114",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "20",

}

TY - JOUR

T1 - Ordering-enhanced dislocation glide in III-V alloys

AU - McMahon, William E.

AU - Kang, Joongoo

AU - France, Ryan M.

AU - Norman, Andrew G.

AU - Friedman, Daniel J.

AU - Wei, Su Huai

N1 - Funding Information: This work was supported by the U.S. Department of Energy under Contract No. DE-AC36-08-GO28308 with the National Renewable Energy Laboratory. The authors would also like to acknowledge Waldo Olavarría for the growth of the samples used in this study.

PY - 2013/11/28

Y1 - 2013/11/28

N2 - Ordering-induced effects on dislocations in metallic alloys have been extensively studied due to their importance in technology applications. We demonstrate that dislocation behavior in ordered III-V semiconductor alloys can be drastically different. This is because ordering in bulk metallic alloys is generally stable, whereas the surface-stabilized group-III sublattice ordering of a III-V alloy is only metastable in the bulk. Here, we show that dislocation glide can release some of the energy stored by ordering of III-V alloys, enhancing the glide of any dislocation which cuts through the ordered layers to create an antiphase boundary in the ordering pattern. This leads to an experimentally observed glide-plane switch which is unique to ordered III-V alloys. Implications for other unique strain-relaxation processes in III-V ordered alloys are also discussed.

AB - Ordering-induced effects on dislocations in metallic alloys have been extensively studied due to their importance in technology applications. We demonstrate that dislocation behavior in ordered III-V semiconductor alloys can be drastically different. This is because ordering in bulk metallic alloys is generally stable, whereas the surface-stabilized group-III sublattice ordering of a III-V alloy is only metastable in the bulk. Here, we show that dislocation glide can release some of the energy stored by ordering of III-V alloys, enhancing the glide of any dislocation which cuts through the ordered layers to create an antiphase boundary in the ordering pattern. This leads to an experimentally observed glide-plane switch which is unique to ordered III-V alloys. Implications for other unique strain-relaxation processes in III-V ordered alloys are also discussed.

UR - http://www.scopus.com/inward/record.url?scp=84888580416&partnerID=8YFLogxK

U2 - 10.1063/1.4833244

DO - 10.1063/1.4833244

M3 - Article

AN - SCOPUS:84888580416

SN - 0021-8979

VL - 114

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 20

M1 - 203506

ER -

Ordering-enhanced dislocation glide in III-V alloys

Abstract

Bibliographical note

Access to Document

Other files and links

Fingerprint

Cite this