Dresden 2026 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 33: Altermagnets IV
MA 33.3: Vortrag
Mittwoch, 11. März 2026, 15:30–15:45, HSZ/0002
Unconventional Magnetism in Fe-Based Materials — Reuel Dsouza1, Andreas Kreisel1, Brian M. Andersen1, Daniel Agterberg2, and •Morten H. Christensen1 — 1Niels Bohr Institute, University of Copenhagen, 2200 Copenhagen, Denmark — 2Department of Physics, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53201, USA
Odd-parity magnetism constitutes an intriguing phase of matter which breaks inversion symmetry while preserving time-reversal symmetry. Here we demonstrate that the Fe-based superconductors exhibiting coplanar magnetic order realize an odd-parity magnetic state by combining low-energy modeling with density-functional theory. In the absence of spin-orbit coupling, the electronic spins are polarized along the kz-direction and the splitting of the up and down states exhibits an h- wave form-factor. The magnitude of the splitting depends sensitively on specific parameters of the low-energy model, including specific out-of-plane hopping parameters and the Fermi energies of the hole- and electron-pockets. Interestingly, despite this state breaking inversion symmetry and exhibiting a finite out-of-plane Berry curvature and non-linear anomalous Hall effect, the Edelstein effect vanishes. Incorporating spin-orbit coupling tilts the momentum-space electronic spins into the (kx, ky)-plane and imparts finite in-plane components to the Edelstein response. Our findings highlight the Fe-based superconductors as platforms for exploring odd-parity magnetism both on its own and coexisting with unconventional superconductivity.
Keywords: Odd-parity magnetism; Unconventional magnetism; Unconventional superconductivity; Fe-based superconductor