Left-handed magnons in the metallic ferromagnet SrRuO3
Recently Onoda, Michenko and Nagaosa propose SrRuO3 as a candidate material for the realization of the left-handed magnon. SrRuO3 fulfills all four necessary conditions which are needed: (i) basically quenched orbital moment, (ii) strong SOI, (iii) finite contribution of the majority and minority spins to the density of states at EF, and (iv) band degeneracy near the Fermi level. We succeeded in growing large single crystals of SrRuO3 at Cologne University and already started to investigate the magnon dispersion. The main characteristics of the magnon dispersion were determined as Δ=0.88meV and D=108 meVÅ^2. In order to get deeper inside into the character of the magnon modes we want to continue the investigation with polarized neutron scattering. This is particularly interesting with regard to a recent discussed theory concerning the magnetic excitations in SrRuO3, like the proposed relation of the anisotropy gap to the Weyl fermions and to the anomalous Hall effect, or like the left-handed magnon.
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JENNI Kevin; M. Braden; KUNKEMOELLER Stefan and STEFFENS Paul. (2018). Left-handed magnons in the metallic ferromagnet SrRuO3. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1563
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