Sökning: "Peter M. Oppeneer"
Hittade 4 avhandlingar innehållade orden Peter M. Oppeneer.
1. Relativistic theory of laser-induced magnetization dynamics
Sammanfattning : Ultrafast dynamical processes in magnetic systems have become the subject of intense research during the last two decades, initiated by the pioneering discovery of femtosecond laser-induced demagnetization in nickel. In this thesis, we develop theory for fast and ultrafast magnetization dynamics. LÄS MER
2. First-principles theory of electrically-induced spin and orbital magnetization
Sammanfattning : Spin-orbit torques (SOTs) have emerged recently as practical tools to control the magnetization in spintronic devices, but it is debated what the underlying fundamental processes are that enable fast and energy-efficient magnetization switching.In this thesis, we investigate theoretically possible means of controlling magnetization in magnetic materials and heterostructures. LÄS MER
3. Selfconsistent theory of superconductivity in unconventional superconductors
Sammanfattning : Superconductivity is broadly believed to stem from either electron-phonon interaction (EPI) or from purely electronic mechanisms, such as antiferromagnetic spin fluctuations. For many materials the discussion about which of these interactions is the dominant "pairing glue" is still ongoing. LÄS MER
4. Signal Processing Tools for Electron Microscopy
Sammanfattning : The detection of weak signals in noisy data is a problem which occurs across various disciplines. Here, the signal of interest is the spectral signature of the electron magnetic chiral dichroism (EMCD) effect. LÄS MER