Topology in higher dimensions

Topology in higher dimensions

Title of the project: Magnetic spin textures for storage and sensing applications
Name of the VDSP student(s) & image credits: Sabri Koraltan
Project supervised by: Dieter Suess

About me/us: I am Sabri Koraltan and I started my Physics studies in 2016 at the University of Vienna. Since 2017 I am working in the group of Prof. Dieter Suess, where I had the opportunity to gain expertise in the field of micromagnetic simulations. Recently, I have also started to be involved in experimental works using nanosized tornadoes (skyrmions) to be used for storage, and sensing applications. I have so far published over 15 Articles in journals such Nature Communications, Physical Review B, or Advanced Materials, and gave more than 12 talks at international conferences.

Image: Magnetic moments tend to align with the external magnetic field. Thus, most nanomagnets are found to be either monodomain and parallel to the field, or separated into small domains.
There are special materials in which the competing energies lead to the formation of non-collinear states, reminiscent of tiny tornadoes, known as skyrmions. These objects are topologically protected in the sense that they cannot be transformed into the polarised state by a continuous
transformation.
In our recent paper accepted by Nature Physics, we show for the first time that skyrmions with higher topological winding can exist in ferromagnetic multilayer systems. This figure illustrates the results I obtained using numerical simulations and the artistic illustration of higher order topology. The images show large variety of topological objects observed for the first time in simulations and experiments.

I generated the image using Blender, and real figures from numerical simulations. No AI tools were used.