Winding feature and thermal evolution of the gapped Dirac magnons in ${\mathrm{CrI}}_{3}$

Author(s): Weiliang Yao, Matthew B. Stone, Colin L. Sarkis, Yi Li, Ruixian Liu, Xingye Lu, and Pengcheng Dai Here, the authors use inelastic neutron scattering to investigate gapped Dirac magnons in the van der Waals ferromagnet CrI 3 . With high-quality single crystals, they directly resolve the characteristic winding of magnon spectral weight around the K point of the hexagonal Brillouin zone, which provides a key signature of Dirac magnons. The authors further show that the magnon energies exhibit an approximately T 2 thermal renormalization, consistent with magnon-magnon interactions. [Phys. Rev. B 114, 134413] Published Thu Sep 10, 2026