Reproducibility package for article: Systematic Mapping of Altermagnetic Magnons by Resonant Inelastic X-Ray Circular Dichroism

This repository contains the raw ASCII data that underpin the paper:Systematic Mapping of Altermagnetic Magnons by Resonant Inelastic X‑Ray Circular DichroismN. Biniskos, M. dos Santos Dias, S. Agrestini, D. Sviták, K.-J. Zhou, J. Pospíšil, P. Čermák (2025).The data were collected on CrSb at the Cr L₃ edge using circularly polarized X‑rays at the I21 beamline of the Diamond Light Source. They are organized by measurement type in Experiment folder. Supporting theoretical calculation are available in Theory folder. Full description is in the README.md. Short manuscript abstract:Using circularly polarized inelastic X-ray scattering, the authors map spin-wave (magnon) excitations in the altermagnet CrSb and detect a reversible chiral signal for the first time, establishing a practical method to probe altermagnetic magnons.Full abstract:Altermagnets, a unique class of magnetic materials that combines features of both ferromagnets and antiferromagnets, have garnered attention for their potential in spintronics and magnonics. While the electronic properties of altermagnets have been well studied, characterizing their magnon excitations is essential for fully understanding their behavior and enabling practical device appli?cations. In this work, we introduce a measurement protocol combining resonant inelastic X-ray scattering (RIXS) with circular polarization and azimuthal scanning to probe the chiral nature of the altermagnetic split magnon modes in CrSb. This approach circumvents the challenges posed by domain averaging in macroscopic samples, allowing for precise measurements of the polarization and energy of the magnons in individual antiferromagnetic domains. Our findings demonstrate a pronounced circular dichroism (CD) in the magnon peaks, with an azimuthal dependence that is consistent with the theoretical predictions and the g-wave symmetry. By establishing a reliable and accessible method for probing altermagnetic magnons, this work opens new avenues for funda?mental studies of these collective excitations and for developing next-generation magnonic device applications.