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O: Fachverband Oberflächenphysik

O 21: Surface magnetism – Poster

O 21.2: Poster

Monday, March 9, 2026, 18:00–20:00, P2

Spin-polarized LEED and reflectivity in altermagnetic materials — •Sourour Ayari, Aki Pulkkinen, and Jan Minar — New Technologies Research Center, University of West Bohemia in Pilsen, Plzen Czech Republic

Altermagnetic materials exhibit a characteristic non-relativistic spin splitting arising from their unconventional spin-symmetry properties [1-3], which leads to alternating spin textures in momentum space even in the absence of a net magnetization. To probe how these textures manifest at the surface, we use theoretical calculations based on the relativistic Korringa-Kohn-Rostoker multiple scattering method [4-5] to study the spin-polarized low-energy electron diffraction and angle- and spin-resolved reflectivity of electrons. These observables are sensitive to spin-dependent scattering processes and therefore provide a direct window into the surface projections of the altermagnetic spin structure. This approach enables a detailed understanding of the spin-dependent reflectivity in altermagnets and offers deeper insight into their surface electronic and magnetic properties.

References: [1] N. Dale et al., arXiv:2402.13094 (2024). [2] L. Šmejkal et al., Nat. Phys. 18, 404-408 (2022) [3]O Fedchenko, J Minár, A Akashdeep, SW D'Souza- Science advances, 2024 [4]J Krempaský, L Šmejkal, SW D'souza, M Hajlaoui- Nature, (2024) [5] J. Minár & H. Ebert, J. Electron Spectrosc. Relat. Phenom. 190, 159-170 (2013).

Keywords: SPLEED; Altermagnets; Reflectivity; KKR