Search for dissertations about: "negative-U"
Found 5 swedish dissertations containing the word negative-U.
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1. Electronic Structure Calculations of Point Defects in Semiconductors
Abstract : In this thesis point defects in semiconductors are studied by electronic structure calculations. Results are presented for the stability and equilibrium concentrations of native defects in GaP, InP, InAs, and InSb, for the entire range of doping conditions and stoichiometry. READ MORE
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2. Electron Paramagnetic Resonance studies of negative-U centers in AlGaN and SiC
Abstract : Silicon (Si) is the most commonly used n-type dopant in AlGaN, but the conductivity of Si-doped AlxGa1-xN was often reported to drop abruptly at high Al content (x>0.7) and the reason was often speculated to be due to either compensation by deep levels or self-compensation of the so-called DX (or negative-U) center. READ MORE
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3. Deep Levels in Electron-Irradiated and As-Grown SiC Power Device Material
Abstract : Silicon Carbide (SiC) has several favorable physical properties for the fabrication of highpower, high-temperature and high-frequency devices. Devices in SiC can operate at high temperatures due to the wide band gap and the high thermal stability of the material. READ MORE
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4. Theory of Electron Transport in Superconducting Heterostructures
Abstract : This thesis deals theoretically with electron transport in superconducting heterostructures. Depending on the system I use different theoretical approaches. The thesis contains an introduction followed by four research papers (Papers I-IV). The introduction gives the background of the work in Papers I-IV. READ MORE
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5. Electron Paramagnetic Resonance Studies of Point Defects in AlGaN and SiC
Abstract : Point defects in semiconductor materials are known to have important influence on the performance of electronic devices. For defect control, knowledge on the model of defects and their properties is required. READ MORE
