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...
Magnetic Weyl semimetals are fascinating topological materials that exhibit complex magnetic orders. Here I focus on rare-earth and transition-metal-based magnetic Weyl semimetals. Rare-earth (RE) compounds such as REAlSi are examined using first-principles simulations to explore the connection between helical magnetic ordering and the emergence of Weyl nodes in electronic band structure [1]....
Spin waves, or magnons, are fundamental excitations in magnetic materials that provide insights into their dynamic properties and interactions. Magnons are the building blocks of magnonics, which offer promising perspectives for data storage, quantum computing, and communication technologies. These excitations are typically measured through inelastic neutron techniques, which involve heavy and...
Altermagnets represent a novel class of magnetic materials that bridge the gap between conventional ferro- and antiferromagnets. A unique feature of altermagnets is the lifting of degeneracy of their spin-wave modes (magnons) along the same crystallographic directions in which electronic bands also exhibit spin splitting. This non-degeneracy leads to chirality and directional anisotropy in...
