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 Title: Atom diffusion and impurity-induced layer disordering in quantum well III-V semiconductor heterostructures Author(s): Deppe, Dennis Glenn Doctoral Committee Chair(s): Holonyak, Nick, Jr. Department / Program: Electrical and Computer Engineering Discipline: Electrical Engineering Degree Granting Institution: University of Illinois at Urbana-Champaign Degree: Ph.D. Genre: Dissertation Subject(s): Engineering, Electronics and Electrical Abstract: The process of impurity-induced layer disordering (IILD), or layer intermixing, in Al$\sb{\rm x}$Ga$\sb{\rm 1-x}$As-GaAs quantum-well heterostructures (QWHs) and superlattices (SLs), and in related III-V quantum well heterostructures, has developed extensively. A large variety of experimental data on IILD are discussed and provide newer information and further perspective on crystal self-diffusion, impurity diffusion, and also the important defect mechanisms that control diffusion in Al$\sb{\rm x}$Ga$\sb{\rm 1-x}$As-GaAs, and in related III-V semiconductors. Based on the behavior of Column III vacancies and Column III interstitials, models for the crystal self-diffusion and impurity diffusion that describe IILD are presented and shown to be consistent with available experimental data. We mention that it may be possible to realize even more advanced device structures using IILD, for example, quantum well wires or quantum well boxes. These will require an even greater understanding of the mechanisms (crystal processes) that control IILD, as well as require more refined methods of pattern definition, masking procedures, and crystal processing. Issue Date: 1989 Type: Text Language: English URI: http://hdl.handle.net/2142/19738 Rights Information: Copyright 1989 Deppe, Dennis Glenn Date Available in IDEALS: 2011-05-07 Identifier in Online Catalog: AAI8916238 OCLC Identifier: (UMI)AAI8916238
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