Detection of Antiferromagnetic Magnons in the Two-dimensional Antiferromagnet CrSBr

• Applicant: Privatdozent Dr. Lin Chen
• Subject Area: Experimental Condensed Matter Physics
• Term: since 2026
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 570332449

Although antiferromagnetic (AF) magnons have various intrinsic advantages over ferromagnetic magnons (e.g., higher natural frequency, linear dispersion, as well as both left-and right-handed modes), they have historically been difficult to exploit due to the sub-THz regime of their natural frequencies, which requires a THz excitation source and/or strong magnetic fields. Recently, the emergence of two-dimensional AF semiconductor CrSBr removes this barrier, and it can be an ideal platform to study the fundamental properties of AF magnons. The overarching goal of this proposal is to investigate detection and the manipulation of coherent and non-coherent magnon transport in 2D magnets with reduced dimensionality. As a platform for the proposed work, we have selected the 2D AF semiconductor CrSBr, which is an ideal material for such a goal. The concrete objectives can be summarized as follows i) Understanding the magnetization relaxation mechanism of AF materials; ii) Detection of anisotropic damping in CrSBr; iii) Detection of coherent and incoherent AF propogating magnons; iv) Electrical detection of AF spin pumping; v) Manipulation of the magnetic anisotropy and the damping parameter of CrSBr by static gate and by spin currents.

• DFG Programme: Research Grants
• Co-Investigator: Professor Dr. Christian Back