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TT: Fachverband Tiefe Temperaturen
TT 10: Topological Semimetals
TT 10.2: Talk
Monday, March 17, 2025, 15:15–15:30, H36
Terahertz-light induced dynamics in the magnetic Weyl semimetal Mn3Sn — •Anneke Reinold1, Sergey Kovalev1, Tomohiro Uchimura2, Shunsuke Fukami2, and Zhe Wang1 — 1Department of Physic, TU Dortmund University, Germany — 2Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Sendai, Japan
We present a time-resolved spectroscopic study of the strong terahertz (THz) field-driven dynamics in the chiral-structured non-collinear Kagome antiferromagnet Mn3Sn, a material renowned for anomalous transport properties, topological effects, and promising spintronic applications [1]. The driven charge and spin nonequilibrium dynamics are probed by optical transmission and Faraday rotation with a sub-picosecond time resolution for various experimental conditions. By varying THz and optical polarization, sample orientation, and sample temperature, we carry out a comprehensive investigation of the THz field-driven nonequilibrium dynamics, in order to figure out the contributions due to different mechanisms. Our findings provide insight into the THz field-driven spin dynamics in this Kagome antiferromagnet and demonstrate its potential for THz spintronic applications.
[1] J. Han, T. Uchimura et al., Nat. Phys. 20, 1110 (2024).
Keywords: Chiral-Spin Structure; Non-collinear Antiferromagnets