SFB 767 Colloquium: Stabilization of magnetic skyrmions by RKKY interactions
Donnerstag, 12. Juli 2018
15.15 – 16.30 Uhr
U. Nowak, 5315 / W. Belzig, 4782
Prof. Dr. Alexei Kolezhuk, Taras Shevchenko National University of Kyiv and Institute of Magnetism, NAS of Ukraine
Stabilization of magnetic skyrmions by RKKY interactions
We propose a novel mechanism of stabilizing skyrmions in a magnetic monolayer by placing the system on a conducting substrate (normal metal or graphene) which makes the spins interact via the long-range Ruderman-Kittel-Kasuya-Yosida (RKKY) exchange. It is shown that for a metallic substrate skyrmions can be stabilized by fine-tuning the Fermi surface parameters, while for a graphene substrate the stabilization occurs naturally in several geometries.