Non-Reciprocal Magnons in Non-Centrosymmetric {{MnSi}}

Using the cold-neutron triple-axis spectrometers TASP (PSI) and MIRA (MLZ), we recently succeeded in fully mapping out the field-dependent evolution of the non-reciprocal magnon dispersion relations in all magnetic phases of MnSi, beginning from the conical towards the field-polarized ferromagnetic phase. The non-reciprocal nature of the dispersion manifests itself in a full asymmetry (non-reciprocity) of the dynamical structure factor \$S(q, E, $\backslash$mu_0 H_\{int\})\$ with respect to flipping either the direction of the external magnetic field \$$\backslash$mu_0 H_\{int\}\$, the reduced momentum transfer \$q\$, or the energy transfer \$E\$.     «

Using the cold-neutron triple-axis spectrometers TASP (PSI) and MIRA (MLZ), we recently succeeded in fully mapping out the field-dependent evolution of the non-reciprocal magnon dispersion relations in all magnetic phases of MnSi, beginning from the conical towards the field-polarized ferromagnetic phase. The non-reciprocal nature of the dispersion manifests itself in a full asymmetry (non-reciprocity) of the dynamical structure factor \$S(q, E, $\backslash$mu_0 H_\{int\})\$ with respect to flip...     »