Sökning: "impurities"
Visar resultat 21 - 25 av 260 avhandlingar innehållade ordet impurities.
21. Methods for theoretical studies of the electronic structure of deep level impurities in semiconductors
Sammanfattning : .... LÄS MER
22. Atomic Spectroscopy on Fusion Relevant Ions and Studies of Light Impurities in the JET Tokamak
Sammanfattning : The spectrum and energy levels C IV and the 3l4l' system of the Mg-like ions in the iron group elements has been investigated. This has led to several hundred identified transitions, many of them previously unknown. LÄS MER
23. Characterization of Impurities in Different Ferroalloys and Their Effects on the Inclusion Characteristics of Steels
Sammanfattning : Ferroalloys have become increasingly important due to their indispensable role in steelmaking. As the performance requirements of steel materials increase, it is necessary to have a better understanding of the impact of impurities in ferroalloys on the steel cleanliness. LÄS MER
24. Graphene field-effect transistors and devices for advanced high-frequency applications
Sammanfattning : New device technologies and materials are continuously investigated, in order to increase the bandwidth of high-speed electronics, thereby extending data rate and range of applications. The 2D-material graphene, with its intrinsically extremely high charge carrier velocity, is considered as a promising new channel material for advanced high frequency field-effect transistors. LÄS MER
25. On the Properties of Some Strongly Correlated Systems - Analytical and Numerical Studies
Sammanfattning : This thesis is dedicated to analytical and numerical studiesof a few models of strongly correlated systems and thedevelopment of techniques for such studies. The common name"strongly correlated" refers to systems in which theinteractions (correlations) between the constituent particleslead to nontrivial properties, such as various types ofmagnetism, superconductivity, and exotic phases. LÄS MER