Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 54: Altermagnets VI
MA 54.1: Vortrag
Freitag, 13. März 2026, 09:30–09:45, HSZ/0002
A metallic p-wave magnet with commensurate spin helix — Rinsuke Yamada1, •Jan Masell2,3, Moritz M. Hirschmann3, and Max Hirschberger1,3 — 1The University of Tokyo, Tokyo, Japan — 2Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany — 3RIKEN Center for Emergent Matter Science (CEMS), Wako, Japan
Antiferromagnetic states with a spin-split electronic structure give rise to spintronic, magnonic and electronic phenomena despite (near-)zero net magnetization. Even-parity spin-split magnets (d, g-wave) can be collinear and are known as altermagnets. Odd-parity magnets (p, f-wave) may be termed antialtermagnets and need co-planar magnetic order.[1] In this talk, we present our recent experimental realization of a metallic p-wave magnet, the simplest odd-parity spin-split magnet. [2] The magnetic texture is a coplanar spin helix whose magnetic period is an even multiple of the chemical unit cell, as revealed by X-ray scattering experiments. This texture breaks space-inversion symmetry but approximately preserves time-reversal symmetry up to a half-unit-cell translation, thereby fulfilling the symmetry conditions for p-wave magnetism. Consistent with theoretical predictions, our p-wave magnet shows a characteristic anisotropy in the electronic conductivity. Spin-orbit coupling and a tiny spontaneous net magnetization further break time-reversal symmetry, resulting in a giant anomalous Hall effect.
[1] A. B. Hellenes et al. arXiv2309.01607 (2024). [2] R. Yamada et al. Nature 646, 837 (2025).
Keywords: altermagnetism; spiral; coplanar; Hall effect; p-wave