Berlin 2018 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 10: Skyrmions I (joint session MA/KFM/TT)
MA 10.7: Vortrag
Montag, 12. März 2018, 17:00–17:15, EB 301
Inelastic neutron scattering studies of magnons in the field polarized, conical and Skyrmion phase of MnSi — •Lukas Beddrich1, Tobias Weber3, Robert Georgii1,2, and Peter Böni1 — 1Physik-Department E21, Technische Universität München, 85748 Garching, Germany — 2Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, 85748 Garching, Germany — 3Institut Laue-Langevin (ILL), 38000 Grenoble, France
Cubic chiral magnets, such as MnSi, are prototypical systems for the investigation of various spin structures. They are stabilized by the Dzyaloshinsky-Moriya interaction (DMI), which also gives rise to a universal magnon dispersion [1], [2].
Recently, the effect of non-reciprocal spin wave excitations, which generally emerge from the lack of inversion symmetry, were intensively studied in the field-polarized and helimagnetic phase of MnSi with inelastic neutron scattering [3]. Due to the excellent compatibility between the low-energy theory and the comprehensive measurements, we currently apply a related approach to describe the magnetic excitations found in the skyrmion phase.
[1] M. Janoschek et al. Phys. Rev. B, 81:214436, Jun 2010 doi:10.1103/PhysRevB.81.214436
[2] M. Kugler et al. Phys. Rev. Lett., 115:097203, Aug 2015. doi:10.1103/PhysRevLett.115.097203
[3] T. Weber et al. submitted for publication