Dresden 2026 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 36: Weyl Semimetals (joint session MA/TT)
TT 36.2: Vortrag
Dienstag, 10. März 2026, 14:15–14:30, POT/0361
High-field THz Probing of the Crossover between Weyl and Weyl-Kondo Physics in Mn3+xSn1−x — •Erik W. de Vos1, Zekai Chen1, Debankit Priyadarshi1, Anusree V. Puleri2, Uri Vool2, Claudia Felser2, Edouard Lesne2, and Manfred Fiebig1 — 1Department of Materials, ETH Zurich, Zurich, Switzerland — 2Max-Planck-Institute for Chemical Physics of Solids, Dresden, Germany
We present temperature-dependent high-field THz spectroscopy measurements on a substitution series of the noncollinear antiferromagnet Mn3+xSn1−x. When the Mn substitution is increased from x=0 to x=0.5, Mn3+xSn1−x has been found to transition from a pure Weyl semimetal to a Weyl-Kondo insulator. This is accompanied by the emergence of a hybridization gap of 10.2 meV [1]. Our study uses high-field THz radiation to probe and drive the non-linear response of Mn3+xSn1−x through the onset of Kondo-driven correlations. Via this high-field resonant excitation, we directly probe the dynamic response across the transition from a Weyl semimetal to a Weyl-Kondo insulating state.
[1] Sci. Adv. 6, eabc1977 (2020)
Keywords: High-field Terahertz Spectroscopy; Mn3Sn; Weyl Semimetals; Strongly-correlated Materials; Kondo Physics