Flavia A. Gómez Albarracín (CONICET, UNLP – La Plata, Argentine)
Magnetic skyrmions are swirling particle-like spin textures characterized by their topological properties, which make them promising candidates for technological applications. This has led to a large amount of research exploring the emergence of these textures in a variety of models and materials. Here, we focus on frustrated magnetic systems, specifically in those where a particular combination of exchange interactions in the pure Heisenberg model is known to give spiral spin liquids. First, we discuss the case of MnSc2S4, where the magnetic ions lform a diamond lattice. Previous works suggested a frustrated exchange interaction model with spiral spin liquid phases. Our study, combining experimental and theoretical results, shows the emergence of a low temperature fractional antiferromagnetic skyrmion lattice through perturbative anisotropic couplings. Then, we present our recent work in the frustrated honeycomb lattice, where smaller additional interactions drive the system from a spiral spin liquid at intermediate temperatures to a number of non-trivial topological textures at lower temperatures. Among these are antiferromagnetic skyrmion crystals and patterns formed by meron-antimeron pairs.
Contact : P. Pujol
