Regensburg 2025 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 3: Correlated Magnetism – General
TT 3.6: Vortrag
Montag, 17. März 2025, 10:45–11:00, H32
Thermal Hall transport driven by spin fluctuations — •Ignacio Salgado-Linares1,2, Alexander Mook3, and Johannes Knolle1,2 — 1Technical University of Munich, TUM School of Natural Sciences, Physics Department, 85748 Garching, Germany — 2Munich Center for Quantum Science and Technology (MCQST), Schellingstr. 4, 80799 München, Germany — 3Johannes Gutenberg University Mainz, Institute of Physics, Staudingerweg 7, Mainz 55128, Germany
In recent years, the thermal Hall effect has emerged as a powerful tool for probing topological phenomena of magnetic systems. At low temperatures, the thermal Hall transport of long-range ordered magnets can be described in the framework of linear spin-wave theory (LSWT). However, how to treat regimes with increased thermal fluctuations or non-linearities beyond LSWT is an outstanding question. Therefore, within this project, we developed a numerical technique to extract the thermal Hall transport properties, which intrinsically includes non-linear effects. In particular, we use semi-classical spin dynamics simulations to compute thermal currents due to chiral spin fluctuations in a square lattice model with Heisenberg interaction and DMI. The results are expected to shed new light on the topological thermal transport in systems where topology does not arise from static spin textures, but from spin fluctuations.
Keywords: Thermal Hall; transport; topology