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MA: Fachverband Magnetismus
MA 52: Altermagnets
MA 52.7: Vortrag
Freitag, 22. März 2024, 11:00–11:15, EB 202
Anomalous Nernst effect in the altermagnet Mn5Si3 — •Warlley Hudson Campos1, Venkata Krishna Bharadwaj1, Rodrigo Jaeschke-Ubiergo1, Antonin Bad'ura2, Helena Reichlova2, Libor Šmejkal1,2, and Jairo Sinova1 — 1Institut für Physik, Johannes Gutenberg Universität Mainz, 55099 Mainz, Germany — 2Institute of Physics, Czech Academy of Sciences, Cukrovarnická 10, 162 00 Praha 6, Czech Republic
Altermagnets (AMs), a recently discovered class of magnetic materials, exhibit compensated magnetic ordering and alternating spin-polarization in both direct and reciprocal spaces [1]. AM belong to a different symmetry class from ferromagnets (FMs) and antiferromagnets (AFs) and can host unique properties (spin splitter currents) as well as combine properties of ferromagnets (spin polarized currents) and antiferromagnets (ultrafast spin dynamics). Here, we employ symmetry analysis and first-principle calculations to investigate the anomalous Nernst effect (ANE), the transverse electric response to an applied longitudinal temperature gradient, in the AM phase of Mn5Si3 [2]. We investigate the dependence of the ANE tensor with respect to the orientation of the spin quantization axes. In our calculations, we also demonstrate the controllability of Nernst conductivity through manipulation of chemical potential and temperature. Finally, we discuss possible experimental geometries for observation of ANE.
[1] L. Šmejkal, et al., Phys. Rev. X 12, 031042 (2022). [2] I. Kounta, et al., Phys. Rev. Mat. 7, 024416 (2023).