Dresden 2026 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 67: Focus Session: Unoccupied States by Inverse Photoemission II

O 67.1: Hauptvortrag

Mittwoch, 11. März 2026, 15:00–15:30, WILL/A317

New frontiers of one step model of photoemission for quantum materials — •Jan Minar — New Technologies Research Center, University of West Bohemia in Pilsen, Pilsen, Czechia

Quantum materials feature intertwined electronic correlations, topology, and magnetism, requiring realistic treatments of spin-orbit coupling, interactions, and spin fluctuations. Spin- and time-resolved ARPES (STARPES) is a key probe of their electronic and spin structures, but its quantitative interpretation demands advanced theory. I will present a fully relativistic multiple-scattering Green function (KKR) [1] framework for spin-dependent photoemission that incorporates correlations via DMFT, spin fluctuations via the alloy-analogy model, and light-induced electronic excitations [2,3]. Applications include a one-step photoemission description of altermagnets such as RuO* and MnTe, where spin-ARPES reveals lifted Kramers degeneracy relevant for spintronics, and kagome magnets such as FeSn thin films, where persistent flat-band splitting and selective band renormalization expose strong correlation and topological effects. This framework provides a unified route to unravel spin dynamics in complex quantum materials [4,5,6].

References: [1] H. Ebert et al., Rep. Prog. Phys. 74, 096501 (2011) [2] J. Minár et al., Phys. Rev. B 102, 035107 (2020). [3] J. Braun et al., Physics Reports 749, 1 (2018). [4] J. Krempaský et al., Nature 626, 517 (2024). [5] A.D. Din et al., arXiv:2511.01690 (2025) [6] Z. Ren et al., Nature Communications 15, 9376 (2024).

Keywords: Density functional theory; One steo model of photoemission; ARPES; Altermagnets; Quantum Materials