Chiral Quantum Excitations in the Anisotropic Antiferromagnet {{CsCoBr3}}
Dokumenttyp:
Zeitschriftenaufsatz
Autor(en):
Braun, H. B.; Kulda, J.; Roessli, B.; Visser, D.; Kr̈amer, K. W.; G̈udel, H. U.; B̈oni, P.
Abstract:
Chirality is shown to emerge as a novel degree of freedom of a quantum soliton in the anisotropic spin-12 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.