Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
MA: Fachverband Magnetismus
MA 47: Altermagnets V
MA 47.4: Vortrag
Donnerstag, 12. März 2026, 15:45–16:00, HSZ/0002
Non-collinear achiral altermagnetic semiconductor — •Mengli Hu1, Mikel Iraola1, Paul McClarty2, Jeroen van den Brink1,3, and Maia G. Vergniory4,5 — 1Leibniz Institute for Solid State and Materials Research, IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany — 2Laboratoire Léon Brillouin, CEA, CNRS, Université Paris-Saclay, CEA-Saclay, 91191 Gif-sur-Yvette, France — 3Würzburg-Dresden Cluster of Excellence Ct.qmat, Technische Universitat Dresden, 01062, Dresden, Germany — 4Département de Physique et Institut Quantique, Université de Sherbrooke, Sherbrooke, J1K 2R1 Québec, Canada. — 5Donostia International Physics Center, 20018 Donostia-San Sebastian, Spain
Altermangnets (AMs) constitute a novel family of magnetic materials characterized by the absence of net magnetization and the presence of spin-polarized band structures. Whereas AM phases were initially proposed in collinear structures, the recently discovered noncollinear chiral AMs stand out for their distinct hedgehog spin texture and multifunctionality in spintronics. In this work, we deepen the characterization of these systems by constructing a Landau theory for noncollinear achiral AMs. Furthermore, we demonstrate that the achiral symmetry of the crystal is reflected in the spin texture in reciprocal space, which presents only spatial-even multipoles. These multipoles, distinguished from those in collinear AMs via the high-order secondary order parameters, can couple to many phenomena. Our results suggest non-collinear achiral AMs as a promising platform for spintronics applications due to the potential to achieve various spin textures.
Keywords: first-principles calculation; non-collinear magnetic order; spintronics