** اگر موفق به شرکت در این سمینار نشده اید؛ از طریق این لینک می توانید در کانال یوتیوب انجمن به فیلم ضبط شده آن دسترسی داشته باشید.
Alireza Qaiumzadeh, Senior Researcher
Center for Quantum Spintronics, Department of Physics
Norwegian University of Science and Technology, Norway
:Abstract
In this talk, I first introduce the emerging field of antiferromagnetic (AFM) spintronics and recent experimental and theoretical advances in this field. Then, I present our recent results on the ultrafast generation of isolated AFM skyrmions, nonlinear topological solitons in magnetic systems, in a confined geometry based on atomistic spin dynamics simulations.
Finally, I will show the dynamics of single skyrmions under an applied temperature gradient. I show that although small skyrmions move towards the colder side, similar to the dynamics of classical particles, large skyrmions move towards the hotter region. To explain these results, we develop a deterministic Fokker-Planck formalism for stochastic dynamics of spins in chiral AFM insulators.
