%0 DATA
%A Oleg, Janson
%A Ioannis, Rousochatzakis
%A Alexander A., Tsirlin
%A M., Belesi
%A Andrei A., Leonov
%A Ulrich K., Roessler
%A Jeroen, van den Brink
%A Helge, Rosner
%D 2018
%T The quantum nature of skyrmions and half-skyrmions in Cu2OSeO3
%U https://repository.lboro.ac.uk/articles/journal_contribution/The_quantum_nature_of_skyrmions_and_half-skyrmions_in_Cu2OSeO3/9412865
%K untagged
%X The Skyrme-particle, the skyrmion, was introduced over half a century ago in the context of dense nuclear matter. But with skyrmions being mathematical objects -special types of topological solitons -they can emerge in much broader contexts. Recently skyrmions were observed in helimagnets, forming nanoscale spin-textures. Extending over length scales much larger than the interatomic spacing, they behave as large, classical objects, yet deep inside they are of quantum nature. Penetrating into their microscopic roots requires a multi-scale approach, spanning the full quantum to classical domain. Here, we achieve this for the first time in the skyrmionic Mott insulator Cu 2 OSeO 3. We show that its magnetic building blocks are strongly fluctuating Cu 4 tetrahedra, spawning a continuum theory that culminates in 51a ‰nm large skyrmions, in striking agreement with experiment. One of the further predictions that ensues is the temperature-dependent decay of skyrmions into half-skyrmions.