Speaker
Description
Unconventional magnetism often emerges when the chiral degree of freedom of spins becomes decisive beyond simple collinear order. In this talk, I will show how polarised neutrons directly access the chiral term, enabling sign‑resolved determination of spin chirality in both static magnetic structures and reversibly switched states under external perturbations. Next, I will visualise the opposite polarisations — the handedness of spin precession — of low‑ and high‑energy magnon branches, even in collinear magnets, and account for the characteristic temperature dependence of spin‑current signals. I will then turn to frustrated triangular‑lattice antiferromagnets, where vector‑chiral correlations provide a topological route to long‑lived fluctuating states without long‑range order. Together, these results unify chirality and momentum‑dependent magnon polarisation into a microscopic framework for engineering unconventional magnetic responses and robust spin transport.
| Field of Condensed Matter | Magnetism |
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