Non-reciprocal magnons in non-centrosymmetric MnSi

T. Weber, J. Waizner, G. S. Tucker, L. Beddrich, M. Skoulatos, R. Georgii, A. Bauer, C. Pfleiderer, M. Garst, P. Böni
2018 AIP Advances  
Using two cold-neutron triple-axis spectrometers we have succeeded in fully mapping out the field-dependent evolution of the non-reciprocal magnon dispersion relations in all magnetic phases of MnSi. The non-reciprocal nature of the dispersion manifests itself in a full asymmetry (non-reciprocity) of the dynamical structure factor S(q, E, μ_0 H_int) with respect to flipping either the direction of the applied magnetic field μ_0 H_int, the reduced momentum transfer q, or the energy transfer E.
doi:10.1063/1.5041036 fatcat:q6wydkwgfvhrpcoql6xtzev2ie