Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 43: Spin-Dependent Phenomena in 2D
MA 43.5: Vortrag
Donnerstag, 12. März 2026, 10:45–11:00, POT/0112
Spin-polarized scanning tunneling microscopy of antiferromagnetic spin ordering in a topological Hall material — Alexina Ollier1,2, Valeria Sheina1,2, Seik Pak4, Corina Urdaniz1,2, Muskan Sande1,3, Soonhyung Lee1,2, Lei Fang1,2, Christoph Wolf1,2, Woonghee Cho6, Pyeongjae Park7, Andreas Heinrich1,3, Je-Geun Park6, Moon jip Park4,5, and •Won-Jun Jang1,2 — 1Center for Quantum Nanoscience (QNS), Institute for Basic Science (IBS), Seoul, Korea — 2Ewha Womans University, Seoul, Korea — 3Department of Physics, Ewha Womans University, Seoul, Korea — 4Department of Physics, Hanyang University, Seoul, Korea — 5Research Institute for Natural Science and High Pressure, Hanyang University, Seoul, Korea — 6Department of Physics and Astronomy, Seoul National University, Seoul, Korea — 7Materials Science and Technology Division, Oak Ridge National Laboratory, Tennessee, USA
We report spin-polarized scanning tunneling microscopy measurements on Co1/3TaS2. STM images acquired with a conventional tip reveal the triangular atomic lattice of the surface, whereas SP-STM uncovers additional symmetry features directly linked to the spin-polarized electronic structure of TaS2 arising from the triple-Q magnetic order. The spin-dependent contrast observed with the SP tip confirms the presence of spin-polarized van Hove singularities, a hallmark of the non-coplanar magnetic state. These results demonstrate that SP-STM can directly probe the modified electronic structure arising from chiral magnetic textures in non-coplanar magnets.
Keywords: Spin-polarized STM; Noncoplanar spin ordering; Magnetic van der Waals material; Topological Hall material; Skyrmion