Confinement of magnetic solitons and edge states in a van der Waals material: FeOCl

This paper reports that domain-wall-like modes govern the magnetic response of the van der Waals material FeOCl. Due to boundaries, these excitations condense into an unconventional magnetic order with a diffusional dynamics as probed by M\"ossbauer spectroscopy and Raman scattering. These results have implications for a better understanding of fundamental aspects of soliton-like excitations as well as topological magnetism and related information storage. The authors highlight that the observed phenomenology and proposed condensation of solitons into topological edge states is a generic feature of non-linear systems with confinement.