Finite-Momentum Antiferromagnetic Magnon Dynamics across the Morin Transition in Hematite

Jiaqi Gong, Yuanzhe Tian, Jun Cui +6

Hematite ($\alpha$-Fe${}_2$O${}_3$) is a prototypical antiferromagnetic platform for high-speed spintronics and magnonics, yet its finite-momentum magnon dynamics and spin-reorientation mec…