Sökning: "Torbjörn Björkman"
Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Torbjörn Björkman.
1. Magnetic and Structural Properties of f-electron Systems from First Principles Theory
Sammanfattning : A series of studies of f-electron systems based on density functional theory methods have been performed. The focus of the studies has been on magnetic and structural properties, as well as investigating ways to handle strong electron correlation in these systems. LÄS MER
2. Alternative Methods for Assessment of Split Renal Function
Sammanfattning : Living kidney donation is a clinical situation with unique features in the sense that healthy individuals voluntarily expose themselves to certain risks and inconveniences. Therefore, eliminating as much of the associated discomfort as possible is crucial. LÄS MER
3. Influence of defects and impurities on the properties of 2D materials
Sammanfattning : Graphene, the thinnest material with a stable 2D structure, is a potential alternative for silicon-based electronics. However, zero band gap of graphene causes a poor on-off ratio of current thus making it unsuitable for logic operations. This problem prompted scientists to find other suitable 2D materials. LÄS MER
4. Theoretical prediction of properties of atomistic systems : Density functional theory and machine learning
Sammanfattning : The prediction of ground state properties of atomistic systems is of vital importance in technological advances as well as in the physical sciences. Fundamentally, these predictions are based on a quantum-mechanical description of many-electron systems. LÄS MER
5. Exploring magnetocaloric materials by ab-initio methods
Sammanfattning : This thesis explores the characterization of magnetocaloric materials from first-principles calculations, emphasizing entropy variation associated with the magnetocaloric effect. The study happens in the context of the search for new magnetocaloric materials to be applied in domestic magnetic refrigerators, as environmentally friendly and energy-efficient alternatives to conventional vapor-compression devices. LÄS MER