Circular Dichroism in Resonant Inelastic X-Ray Scattering: Probing Altermagnetic Domains in MnTe

• Autoři: TAKEGAMI D.; AOYAMA T.; OKAUCHI T.; YAMAGUCHI T.; TIPPIREDDY S.; AGRESTINI S.; GARCIA-FERNANDE M.; MIZOKAWA T.; OHGUSHI K.; ZHOU Ke-Jin; CHALOUPKA Jiří; KUNEŠ Jan; HARIKI A.; SUZUKI H.
• Rok publikování: 2025
• Druh: Recenzovaný odborný článek
• Časopis / Zdroj: PHYSICAL REVIEW LETTERS
• Fakulta / Pracoviště MU: Přírodovědecká fakulta
• www: https://doi.org/10.1103/512v-n5f9
• Doi: https://doi.org/10.1103/512v-n5f9
• Klíčová slova: Domains; Magnetism; Altermagnets; Inelastic X-ray scattering

Přiložené soubory

• 2548637.pdf

• Popis: X-ray magnetic circular dichroism provides a means to identify ferromagnetic, chiral, and altermagnetic orders via their time-reversal-symmetry (??) breaking. However, the symmetry properties that govern circular dichroism (CD) in resonant inelastic x-ray scattering (RIXS) remain poorly understood. We show that, due to the inherent irreversibility of the RIXS process, RIXS-CD does not require ?? breaking to be present, but reflects the change in unitary symmetries associated with magnetic ordering. Using the altermagnetic MnTe as a model system, we observe an azimuthal-angle dependent RIXS-CD signal in the magnon excitations. Our findings highlight the sensitivity of RIXS-CD to the relativistic symmetry in magnetic systems and its potential application as a probe of magnetic domains.