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Showing 1 to 20 of 135 for “"Point Defects"”.
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Role of point defects in Perovskite microwave resonators
… of perovskite compounds containing extrinsic point defects such as vacancies. An empirical approach is used here to develop a predictive model based solely on chemical composition and published ionic radii. Effective vacancy sizes were derived both empirically from an existing model for …
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Contributions From Point-Defects to the Elastic-Constants of Copper
Made available in DSpace on 2015-05-12T22:39:08Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7414605.PDF: 3271994 bytes, checksum: 5eed066ef618ab4f123ef8eed73ec0cf (MD5) Previous issue date: 1974
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Contributions from point defects to the elastic constants of copper
Submitted by William Weathers (weathrs2@illinois.edu) on 2012-03-02T20:40:27Z No. of bitstreams: 1 1974_rehn.pdf: 3330831 bytes, checksum: 3fda044ab13dcea0117d970b840792e9 (MD5)
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Elastic Modulus Effect in the Interaction of Point Defects With Dislocation Ribbons
Made available in DSpace on 2014-12-10T17:57:52Z (GMT). No. of bitstreams: 1 6901445.pdf: 4088954 bytes, checksum: 6fa9bda44e396f3b26236e36f41af3ab (MD5) Previous issue date: 1968
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An ultrasonic study of point defects in electron-irradiated P-type silicon
… of interaction of ultrasonic waves with point defects in crystals are reviewed and a perturbation approach is introduced which leads to general expressions for the resonance and relaxation strengths in terms of matrix elements of the ultrasonic perturbation. These expressions provide the …
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Ultrasonics studies of point defects in iron, aluminum-lithium, and gallium arsenide
The ultrasonics studies undertaken in this work illustrate the applicability of ultrasonics to a broad variety of problems. In the case of Fe, the objective is to measure the production and annealing of the diaelastic effect of self-interstitials in Fe. Frenkel Pairs created by 2.3 MeV electron …
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The uncommon nature of point defects in organic-inorganic Perovskite solar cells
… organic-inorganic perovskites, the majority of point defects with low formation energy are shallow, with energies within or near the conduction or valence band. Defects with deep states, which act as electronic traps, are expected to be much less common due to their high formation energies. In …
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Point Defects And Defect-Related Transport Of Matter In Transition Metal-Containing Orthosilicates
Point defects and defect-related transport properties of transition metalcontaining orthosilicates with the olivine structure are interesting topics but are not yet well understood. At high temperatures, the transport properties of sufficiently pure olivines are governed by point defects. To …
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Modeling microdefects formation in crystalline silicon : the roles of point defects and oxygen
… demand for control of size and density of microdefects in the silicon for control of quality and uniformity of the fabricated microelectronic devices. This thesis is aimed at developing a fundamental understanding of the mechanisms for formation of such microdefects through the development of …
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The effect of point defects in copper on the anomalous transmission of X-rays
… calculated displacements associated with these defects, indicates that the interstitial is not in the split (100) configuration. Possible configurations are the body centered interstitial or the split (111) interstitial. Measurements after annealing at BOoK and 3000K were made. The measurements …
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Surface chemistry to control bulk reaction dynamics of native point defects in rutile titanium dioxide
… concentration and spatial distribution of the point and extended defects it contains. For ceramic oxide semiconductor materials, the concentration and diffusion of cations and anions, in the form of interstitials and vacancies, plays a large role in the performance of these materials for gas …
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Analyzing Electronic Correlation Effects in Molecules and Semiconductor Point Defects from First Principles Beyond Density Functional Theory
Transition-metal based molecules and point defects in wide-bandgap semiconductors have been of particular interest lately due to their potential quantum information science applications. To accurately calculate the electronic properties of these systems from first principles, it is important to …
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The Thermodynamics of Contrained Systems and the Stability of Solid Phases in the Presence of Excess point Defects
Made available in DSpace on 2017-07-06T18:48:32Z (GMT). No. of bitstreams: 3 Holloway_James_P_MS.pdf: 79526238 bytes, checksum: 0e68eb4552ccd78d39de6b2df129d60a (MD5) Holloway_James_P_MS_ABS.pdf: 576867 bytes, checksum: 3e94108127ee4aff3a68070ebc3fa888 (MD5) license.txt: 4813 bytes, checksum: …
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Effects of Intrinsic and Extrinsic Point Defects on Epitaxial Single Crystal Copper-Indium(1-X)-Gallium(x)-Diselenide
The steady state photoconductivity of samples which had been ion implanted with Se and Cr, as well as samples which were contaminated with Na by diffusion, was measured. These measurements were made to determine whether contamination by these elements or severe radiation damage affects minority …
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The production and annealing of point defects produced by quenching and by tensile deformation in pure gold and silver
… energy is 0.70 ± .04 eV. The identity of defects taking part in stage III in silver is not clear at the present time.
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