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 wavelengths in the entire class of van der Waals magnets currently under investigation. According to the researchers, successfully identifying the mechanism of spin propagation provides a set of optimization rules, as well as caveats, that are essential for any future applications of these promising systems… read more. TECHNICAL ARTICLE
Detection of coherent magnon propagation. Credit: Nature Physics, 01 February 2024Â