Study of Phase Separation and Ordering in InGaN and AlInGaN: Experimental and Computer Modeling.

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dc.contributor.advisorSalah Bedair, Committee Memberen_US
dc.contributor.advisorMark Johnson, Committee Memberen_US
dc.contributor.advisorDonald Brenner, Committee Co-Chairen_US
dc.contributor.advisorNadia El-Masry, Committee Chairen_US
dc.contributor.authorBehbehani, Mark Kianen_US
dc.date.accessioned2010-04-02T19:00:05Z
dc.date.available2010-04-02T19:00:05Z
dc.date.issued2005-02-13en_US
dc.degree.disciplineMaterials Science and Engineeringen_US
dc.degree.leveldissertationen_US
dc.degree.namePhDen_US
dc.description.abstractA comprehensive study examines the phase behaviour of InGaN and AlInGaN including growth characterization and computer modeling. InGaN alloys were grown with up to 50% InGaN and studied for phase separation and ordering. The AlInGaN system has been studied with discovery of the Self Assembled Super-Lattice (SASL) and the Strain Equilibrium Indium (In) Incorporation Effect. Computer modeling was performed using a strain based Valence Force Field (VFF) model combined with a Monte Carlo method to study both the composition pulling and the Strain Equilibrium In Incorporation Effect In the InGaN system, both phase separation and ordering behaviour in the InGaN system was studied extensively. Using Transmission Electron Microscopy, the presence of simultaneous phase separation and (0002) ordering was confirmed. The composition pulling effect was also studied in the InGaN system. VFF computer modeling was successfully used to predict the composition of highly strained InGaN films based on the bulk composition. In the AlInGaN system, the SASL effect was discovered using Transmission Electron Microscopy. In addition the Strain Equilibrium In Incorporation Effect was discovered using a combination of Transmission Electron Microscopy and X-ray diffraction. Using a VFF Metropolis Monte Carlo algorithm, the Strain Equilibrium In Incorporation Effect has been studied. The computer model has been able to predict the In incorporation behaviour of highly strained films in the AlInGaN system and has confirmed that the strain energy is the primary factor determining the In composition in strained AlInGaN films.en_US
dc.identifier.otheretd-08112004-211850en_US
dc.identifier.urihttp://www.lib.ncsu.edu/resolver/1840.16/4731
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectMOCVDen_US
dc.subjectAlInGaNen_US
dc.subjectInGaNen_US
dc.subjectVFFen_US
dc.subjectComputer Modelingen_US
dc.subjectMonte Carloen_US
dc.subjectStrainen_US
dc.titleStudy of Phase Separation and Ordering in InGaN and AlInGaN: Experimental and Computer Modeling.en_US

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