Dresden 2026 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 20: Altermagnets III

MA 20.3: Vortrag

Dienstag, 10. März 2026, 14:30–14:45, HSZ/0002

Designing non-relativistic spin-splitting in transition metal oxide bulk and heterostructures — •Subhadeep Bandyopadhyay and Rossitza Pentcheva — Department of Physics, University of Duisburg-Essen, Duisburg, Germany

Non-relativistic spin splitting (NRSS) of bands in collinear antiferromagnets is an exotic phenomenon, that has currently shifted in the focus, owing to the great potential for various spintronic applications. Studies showed that the inhomogeneous distribution of the real space magnetization density, originating from the ferroically ordered magnetic octupole moments^[1] is the key to this exotic phenomenon, which stems from the global time reversal symmetry (TRS) breaking in antiferromagnets. In perovskite ABO₃ materials, we find an intriguing correlation between the antiferroic distortion patterns and the antiferromagnetic order, that breaks TRS to induce NRSS^[2].

Here we explore how structural distortions and antiferromagnetism combine to induce NRSS in perovskites. Building on that insight, we demonstrate the recipe to design and control the NRSS. Beyond the bulk compounds, the discussion is extended to the perovskite heterostructures, where interface-driven structural distortions and modifications of the electronic properties are crucial.

1. S Bhowal and N A Spaldin, Phys. Rev. X 14, 011019 (2024)
2. S. Bandyopadhyay, S Picozzi, S Bhowal, Phys. Rev. B 112, 064405, (2025)

Keywords: Altermagnet; Magnetism; Perovskite; Density functional theory