2026/01/14 by Paul Leask, Calum Ross, Egor Babaev +1
Physics and Astronomy · Materials Science · #Physics of Superconductivity and Magnetism #Rare-earth and actinide compounds #Iron-based superconductors research
paper · pdf · doi:10.1103/crwr-b57q
We study composite topological excitations in ferromagnetic superconductors consisting of bound states of magnetic spin textures (skyrmions) and superconducting vortices. Using a Ginzburg-Landau framework with Zeeman coupling between the magnetization and the superconducting magnetic field, we demonstrate that skyrmion-vortex pairs (SVPs) form energetically stable bound states. By analyzing their asymptotic interactions, we identify regimes in which SVPs exhibit both short-range repulsion and long-range attraction, leading to clustering phenomena. Our results provide a field-theoretical basis for understanding suggested pathways for controlling hybrid topological matter through long-range interactions.