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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 13: Focus Session: (Multi-)Ferroic States III
KFM 13.2: Talk
Wednesday, March 20, 2024, 10:00–10:20, EMH 225
Topological aspects of switching in ferroic materials — Francesco Foggetti2,1, Margherita Parodi1,3, Naoto Nagaosa4, and •Sergey Artyukhin1 — 1Italian Institute of Technology, Genova, Italy — 2Dept. of Physics and Astronomy, Uppsala University, Sweden — 3Department of Physics, University of Genova, Italy — 4CEMS RIKEN, Tokyo, Japan
Topology has played a prominent role in condensed matter physics in the recent years. In magnetism, topological properties of domain walls and vortices were known for a long time, and more recently topological magnon band structures and other aspects were discussed. However, switching, one of the most important processes from the viewpoint of applications, has not been discussed in the context of topology until recently, when magnetoelectric switching in GdMn2O5 [1], the first known topologically protected ferroic switching phenomenon, was discovered. Here we discuss electric field induced switching in spiral multiferroics, where topology plays an important role.
[1] Louis Ponet, SA, Th. Kuhn et al., Nature 607, 81 (2022).
Keywords: ferroic switching; non-collinear magnetism; topological phenomena; magnetoelectric effect; magnetic dynamics