Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 33: Altermagnets IV
MA 33.11: Vortrag
Mittwoch, 11. März 2026, 17:45–18:00, HSZ/0002
Altermagnetic Magnons in MnTe Probed by CD-RIXS — Daniel Jost1,2, Resham B. Regmi3,4, Eder G. Lomeli5,1, Samuel Sahel-Schackis6,2,7, •Monika Scheufele8,9, Marcel Neuhaus2, Rachel Nickel10, Flora Yakhou10, Kurt Kummer10, Nicholas B. Brookes10, Lingjia Shen2, Georgi L. Dakovski2, Nirmal J. Ghimire3,4, Stephan Geprägs8, and Matthias F. Kling6,2,11 — 1Stanford Inst. for Material and Energy Science, SLAC, USA — 2Linac Coherent Light Source, SLAC, USA — 3Dept. of Physics and Astronomy, Univ. of Notre Dame, USA — 4Stravropoulos Center for Complex Quantum Matter, Univ. of Notre Dame, USA — 5Dept. of Materials Science and Engineering, Stanford Univ., USA — 6Stanford PULSE Inst., SLAC, USA — 7Dept. of Physics, Stanford Univ., USA — 8Walther-Meißner-Inst., BAdW, Germany — 9TUM School of Natural Sciences, Physics Dept., TUM, Germany — 10ESRF, France — 11Dept. of Applied Physics, Stanford Univ., USA
Altermagnetism has emerged as a novel magnetic order combining features of both ferro- and antiferromagnetism. Despite their compensated spin structure, altermagnets exhibit symmetry-induced momentum-dependent splitting of magnon bands with well-defined chirality. This splitting must reflect the material’s point-group symmetry. Here, we demonstrate the chiral character of these magnons by circular-dichroism resonant inelastic X-ray scattering (CD-RIXS) on altermagnetic α-MnTe [1]. We reveal momentum-dependent dichroism, indicating the polarization-dependent magnon splitting consistent with a g-wave symmetry. [1] D. Jost et al., arXiv:2501.17380v2 (2025).
Keywords: Altermagnetism; Resonant Inelastic X-ray Scattering; MnTe; Magnons