H. B. Braun, J. Kulda, B. Roessli, D. Visser, K. W. Krämer, H. U. Güdel and P. Böni
Chiral quantum excitations in the anisotropic antiferromagnet CsCoBr₃
J. Magn. Magn. Mater. 310, 1194-1196 (2007)                 

Abstract: Chirality is shown to emerge as a novel degree of freedom of a quantum soliton in the anisotropic spin-1/2 compound CsCoBr₃. The soliton chirality, detected via polarized neutron scattering, is in agreement with theoretical predictions and is a manifestation of Berry's phase. Our observations provide an explicit example of the emergence of spin currents and hidden chiral order that accompany the disappearance of antiferromagnetic order.