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dc.contributor.advisorGorman, Brian P.
dc.contributor.authorFrance, Ryan Matthew
dc.date.accessioned2015-12-16T16:38:20Z
dc.date.accessioned2022-02-03T12:51:20Z
dc.date.available2015-12-16T16:38:20Z
dc.date.available2022-02-03T12:51:20Z
dc.date.issued2015
dc.identifierT 7920
dc.identifier.urihttps://hdl.handle.net/11124/166673
dc.description2015 Fall.
dc.descriptionIncludes illustrations (some color).
dc.descriptionIncludes bibliographical references.
dc.description.abstractStrain relaxation of III-V materials is a complex process that can be heavily influenced by material microstructure. In this thesis, I investigate the effects of CuPt atomic ordering on dislocation formation and glide in III-V materials. CuPt atomic ordering has been observed in many ternary and quaternary III-V materials, and consists of alternating {111} planes of one or both of the mixed-group constituents. Most importantly, the ordered structure is induced by the surface reconstruction during epitaxy and is metastable in the bulk of the film. Glide through ordered planes disrupts the order pattern and reduces this metastability, and so is energetically favorable. This presents a unique situation where dislocations receive an additional driving force for glide. The additional glide force reduces the critical thickness of pseudomorphic material, but should also beneficially increase the glide length of metamorphic material. In addition, the distribution of dislocations is heavily skewed towards those that disrupt the order pattern. New dislocations can form upon order-disorder transitions in a metamorphic buffer as glide becomes more energetically favorable on different glide planes, necessitating redesign of the buffer structure. Further implications are discussed, as well as strategies to improve stability of pseudomorphic material and reduce the dislocation density of metamorphic material.
dc.format.mediumborn digital
dc.format.mediumdoctoral dissertations
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartof2015 - Mines Theses & Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.subjectatomic ordering
dc.subjectdislocations
dc.subjectIII-V materials
dc.subjectphotovoltaics
dc.subjectstrain
dc.titleDislocation formation and glide in atomically-ordered III-V semiconductors
dc.typeText
dc.contributor.committeememberToberer, Eric
dc.contributor.committeememberPackard, Corinne E.
dc.contributor.committeememberZimmerman, Jeramy D.
dc.contributor.committeememberAl-Jassim, Mowafak
thesis.degree.nameDoctor of Philosophy (Ph.D.)
thesis.degree.levelDoctoral
thesis.degree.disciplineMetallurgical and Materials Engineering
thesis.degree.grantorColorado School of Mines


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