Phys.org  May 9, 2024 Recently, transduction was shown in a van der Waals antiferromagnet, where strong spin-exciton coupling enabled readout of the amplitude and phase of coherent magnons by photons of visible light. This discovery shifted the focus of research to transmission, specifically to exploring the non-local interactions that enable magnon wave packets to propagate. An international team of researchers (UC Berkeley, Lawrence Berkeley National Laboratory, South Korea, Czech Republic) demonstrated that magnon propagation was mediated by long-range dipole–dipole interaction. This coupling was the consequence of fundamental electrodynamics and, as such, will likely mediate the propagation of spin at long […]