We show that, in a Néel antiferromagnet with a particular location of electron band extrema, a Skyrmion and an electron form a bound state with energy of the order of the gap ∆ in the electron spectrum. The bound state turns the Skyrmion into a charged particle, that may be manipulated by electric field. We identify a region in the space of coupling constants, where the Skyrmion-electron bound state makes the (otherwise metastable) Skyrmion genuinely stable.
We study electron states, bound to topological textures such as skyrmions and domain walls in a Néel antiferromagnet. In certain limits, we find the dependence of bound states on the geometry of the texture, and estimate the bound-state contribution to its energy. This contribution proves significant compared with the purely magnetic energy, and substantially affects the equilibrium geometry of the texture. The bound-state contribution also induces a large shift of the transition line between the modulated and the uniform phase, extending the latter.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.