Regensburg 2025 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 3: Correlated Magnetism – General
TT 3.5: Talk
Monday, March 17, 2025, 10:30–10:45, H32
Electronic structure of the noncentrosymmtric tetragonal antiferromagnet EuPtSi3 — •Katharina Müller1, André Deyerling1, Andreas Bauer1,2, Wolfgang Simeth1,3, Christian Franz1,4, Christian Pfleiderer1,2,5,6, and Marc A. Wilde1,2 — 1Physik Department, TUM School of Natural Sciences, TUM, Germany — 2Zentrum für Quantum Engineering (ZQE), TUM, Germany — 3Los Alamos National Laboratory, Los Alamos, NM, USA — 4Jülich Centre for Neutron Science (JCNS) at MLZ, Forschungszentrum Jülich GmbH, Germany — 5Munich Center for Quantum Science and Technology (MCQST), TUM, Germany — 6Heinz Maier-Leibnitz Zentrum (MLZ), TUM, Germany
The localized Eu2+ moments of the rare-earth compound EuPtSi3 were reported to show magnetic ordering below the Néel temperature TN = 17 K [1]. With a magnetic field applied in the magnetically hard basal plane, four different types of noncollinear antiferromagnetic order emerge, one of which is commensurate with the lattice [2]. This coplanar canted magnetic structure breaks the crystal symmetry such that Berry curvature contributions are allowed and electronic transport phenomena may be affected. We study this link between the magnetic and the electronic structure with ab initio calculations, in particular highlighting the effect of changing the canting angle from the antiferromagnetic towards the spin-polarized state.
[1] A. Bauer et al., PRM 6, 034406 (2022).
[2] W. Simeth et al., PRL 130, 266701 (2023).
Keywords: Antiferromagnetism; Berry curvature; Electronic structure; Transport