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MA: Fachverband Magnetismus
MA 47: Altermagnets III
MA 47.6: Vortrag
Freitag, 21. März 2025, 10:45–11:00, H20
Spin polarons in Altermagnets — •Maria Daghofer1, Krzysztof Wohlfeld2, and Jeroen van den Brink3 — 1FMQ, Universität Stuttgart, Stuttgart, Germany — 2University of Warsaw, Warsaw, Poland — 3IFW Dresden, Dresden, Germany
We numerically investigate hole motion in altermagnetic Mott insulators, beyond the weakly interacting case, where a mean-field description is applicable. In this strongly correlated regime, hole motion is strongly affected by coupling to quantum fluctuations of the magnetic background. We find that the underlying altermagnetic symmetries manifest themselves in spin-momentum locking of the coherent quasi-particle: At certain momenta, it has a spin-polarized character, while states corresponding to the opposite spin are considerably more incoherent. We also address the impact of quantum fluctuations.
Keywords: Mott insulator; quantum magnetism