Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 44: Non-Skyrmionic Magnetic Textures
MA 44.3: Vortrag
Donnerstag, 21. März 2024, 15:45–16:00, EB 301
Non-coplanar helimagnetism in the layered van-der-Waals metal DyTe3 — Shun Akatsuka1, •Sebastian Esser1, Jonathan White2, Rinsuke Yamada1, Seno Aji3, Shang Gao4, Yoshichika Onuki5, Taka-hisa Arima1,5, Taro Nakajima3,5, and Max Hirschberger1,5 — 1University of Tokyo, Japan — 2PSI, Switzerland — 3ISSP, University of Tokyo, Japan — 4University of Science and Technology of China, China — 5RIKEN CEMS, Japan
Layered van-der-Waals (vdW) materials are typified by highly anisotropic chemical bonds, enabling exfoliation to realize ultrathin sheets or interfaces. When combined with magnetism, such materials are promising candidates for novel cross-correlation phenomena between electric polarization and the magnetic texture itself. However, the vast majority of these vdW magnets are collinear ferro-, ferri-, or antiferromagnets, with a particular scarcity of lattice-incommensurate helimagnets of well-defined left- or right-handedness. Here we report on the magnetic order of DyTe3, where insulating double-slabs of Dy-square nets are separated by highly metallic Te-layers.
This cleavable metallic helimagnet hosts a complex magnetic phase diagram, indicative of competing interactions. At high temperatures, above the transition to three-dimensional long-range order, we observe evidence for short-range correlations in individual two-dimensional structural block layers. Our work paves the way for twistronics research, where helimagnetic layers can be combined to form complex spin textures on-demand, using the vast family of rare earth chalcogenides, and beyond.
Keywords: helimagnetism; rare earth chalcogenides; van-der-Waals material; twistronics