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Updated: Jan 10, 2026

Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
Circular Dichroism in Resonant Photoelectron Diffraction as a Direct Probe of Sublattice Magnetization in
1Chiba University, Graduate School of Engineering and Molecular Chirality Research Center, Chiba 263-8522, Japan.
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Altermagnets are a new class of magnetic materials that are promising for spintronics technology. Here, it is shown that in altermagnets, the circular dichroism (CD) in resonant photoelectron diffraction (RPED) contains a time-reversal odd signal, which provides a direct probe of the sublattice magnetization. RPED calculations are performed for MnTe at the Mn L_{2,3}-edge resonance, using a combination of atomic multiplet and multiple scattering theory. A large magnetic CD is found for light helicity parallel to the Néel vector. This signal has the same angular distribution as the difference between the structural RPED of the two magnetic sublattices and its amplitude is approximately proportional to the x-ray magnetic CD in absorption of a single sublattice, thus providing a direct probe of the local magnetic moments.
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