SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 39: Weyl Semimetals
MA 39.3: Vortrag
Donnerstag, 30. März 2023, 12:00–12:15, HSZ 403
High pressure studies of the topological Hall effect on CeAlGe — •Mario M. Piva1, Jean C. Souza2, Gustavo A. Lombardi3,1, Kevin R. Pakuszewski4, Cris Adriano4, Pascoal G. Pagliuso4,5, and Michael Nicklas1 — 1Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — 2The Weizmann Institute of Science, Rehovot, Israel — 3Brazilian Synchrotron Light Laboratory (LNLS), Campinas, Brazil — 4“Gleb Wataghin” Institute of Physics, Campinas, Brazil — 5Los Alamos National Laboratory, Los Alamos, USA
The Weyl semimetal CeAlGe is an excellent playground to investigate non-trivial topologies in real and momentum space due to the presence of a topological magnetic phase [1]. Our findings show that, the THE in CeAlGe is sensitive to slight stoichiometric variations, similar to its magnetism [2]. The observed change of a single THE region to two distinct regions upon application of external pressure is in agreement with previous reports [3]. Remarkably, we find that application of high pressures leads to the appearance of a THE even in samples where it was absent at ambient pressures.
This project has received funding from the European Unions Horizon 2020 research and innovation programme under the Marie Skłodwska-Curie grant agreement No 101019024.
[1] P. Puphal, et al., Phys. Rev. Lett. 124 017202 (2020); [2] P. Puphal, et al., Phys. Rev. Mat. 3 024204 (2019); [3] X. He, et al., arXiv:2207.08442.