JCNS Workshop 2025, Trends and Perspectives in Neutron Scattering. Quantum Materials: Theory and Experiments

Altermagnetism refers to a class of collinear compensated magnets at weak spin-orbit coupling that have spin-split electronic bands and chirality-split magnon bands both with a distinctive anisotropic pattern in
momentum space. In this talk, I shall briefly summarize the state-of-the-art in the field and then describe how neutron scattering can be used to characterize the key signatures of altermagnetism in these materials.
In particular, I shall discuss altermagnetic domains, local order parameters and the power of polarized neutrons in probing chirality in the magnon bands.