Presentation Information
[2I09]Magnetic structure of altermagnetic surfaces through circular dichroism in resonant photoelectron diffraction
*Peter Krueger1 (1. Chiba University)
Altermagnets are a novel class of magnetic materials with great potential for spintronics technology. A theory of circular dichroism (CD) in resonant photoelectron diffraction (RPED) of altermagnets is presented and it is shown that CD-RPED contains a magnetic signal, which can detect the time-reversal symmetry broken altermagnetic state. RPED calculations are presented for MnTe at the Mn L2,3-edge resonance, using atomic multiplet and multiple scattering. A strong magnetic CD exists for light helicity parallel to the Néel vector. The magnetic CD 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 XMCD of a single sublattice, thus providing a direct probe of the staggered magnetization.