Midway evaluation in Physics - Masoumeh Kazemi
Tæknigarður
Geysir - meeting room
Title of thesis: The interplay between excitonic and magnetic dynamics in 2D chromium trihalides
Doctoral candidate: Masoumeh Kazemi
Doctoral committee:
Dr.Ivan Shelykh, Professor at the Faculty of Physical Sciences, University of Iceland.(Supervisor)
Dr. Pavel Besarab. Linnaeus University, Kalmar, Sweden
Dr. Christian Schneider. University of Würzburg, Germany
Abstract
Novel 2D material CrI3 reveals unique combination of 2D ferromagnetism and robust excitonic response. We demonstrate that the possibility of the formation of magnetic topological defects, such as Néel skyrmions, together with large excitonic Zeeman splitting, leads to giant scattering asymmetry for excitons, which is the necessary prerequisite for the excitonic anomalous Hall effect. In addition, as bright excitons in ferromagnetic monolayers CrI3 efficiently interact with lattice magnetization, all-optical resonant magnetization control in this material becomes possible. In the thesis we develop a microscopic theory of these two effects.