Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 20: Altermagnets III
MA 20.1: Vortrag
Dienstag, 10. März 2026, 14:00–14:15, HSZ/0002
Curvature-induced magnetization of altermagnetic films — •Kostiantyn Yershov1,2, Volodymyr Kravchuk1,2, and Jeroen van den Brink1 — 1Leibniz Institute for Solid State and Materials Research, 01069 Dresden, German — 2Bogolyubov Institute for Theoretical Physics, 03143 Kyiv, Ukraine
Here we generalize the previously developed phenomenology of the d-wave altermagnetic films for the case of a curvilinear film bent in a stretching-free manner. We show that a stretching-free bending of a thin altermangnetic film with nonzero curvature gradients induces local magnetization that is approximately tangential to the film. The origin of curvature-induced magnetization is non-uniformity of the Neel vector distribution generated by the non-zero curvature gradients. The magnitude of the curvature-induced magnetization is determined by the curvature gradient and the direction of bending relative to the crystallographic axes. The maximal effect is achieved when bending is in the direction of maximum altermagnetic splitting in the magnon spectrum. For a periodically bent film of sinusoidal shape possesses a total magnetic moment per period ∝ A2 q4 where A and q are the bending amplitude and wave vector, respectively. The total magnetic moment is perpendicular to the plane of the unbent film and its direction (up or down) is determined by the bending direction.
Keywords: d-wave altermagnet; curved geometry