Dresden 2026 – scientific programme

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MA: Fachverband Magnetismus

MA 33: Altermagnets IV

MA 33.8: Talk

Wednesday, March 11, 2026, 17:00–17:15, HSZ/0002

Electronic Raman spectroscopy in altermagnet MnTe — •Garima Garima^{1, 2, 3}, Thomas Böhm^{1, 3}, Rudi Hackl³, Bernd Büchner^{1, 3}, and Jochen Geck^{1, 2} — ¹Institut für Festkörper- und Materialphysik, Technische Universität Dresden, 01062 Dresden, Germany — ²Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062 Dresden, Germany — ³Leibniz Institute for Solid Sate and Materials Research Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany

Altermagnets, the new class of magnets, are promising candidates to realize spintronic and spin-information processing devices. The new magnetic state is characterized by broken time-reversal symmetry, resulting in spin-split bands in momentum space and hence provides a basis to foster chiral magnetic excitations. Here, we utilize electronic Raman scattering to investigate chirality in the hexagonal altermagnet MnTe. In consistency with RIXS experiments [1], our polarization-resolved results reveal optical signatures of 2-magnon excitations, appearing below the magnetic transition temperature of 310 K in the chiral A_2g channel. [1] Jost, D., et al. Chiral altermagnon in MnTe. arXiv preprint arXiv:2501.17380.

Keywords: Raman Spectroscopy; Hexagonal Altermagnets; Chirality; Magnon excitations