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TT: Fachverband Tiefe Temperaturen
TT 21: Topological Semimetals 1
TT 21.1: Vortrag
Dienstag, 17. März 2020, 09:30–09:45, HSZ 103
Optical conductivity of generalized Weyl semimetals — •Lucky Z. Maulana1, Ece Uykur1, Seulki Roh1, Yohei Saito1, Motoharu Imai2, Kaustuv Manna3, Claudia Felser3, Martin Dressel1, and Artem V. Pronin1 — 11. Physikalisches Institut, Universität Stuttgart, 70569 Stuttgart, Germany — 2National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0047, Japan — 3MPI für Chemische Physik fester Stoffe, 01187 Dresden, Germany
Generalizations of Weyl semimetals are realized in materials, where more than two non-degenerate electronic bands touch at a given point of Brillouin zone. We have optically studied two groups of such materials: the multifold semimetals RhSi, CoSi, and PdGa, where the higher-spin generalizations of Weyl points have been confirmed, and SrSi2 – a material, where quadratic double-Weyl fermions are supposed to be realized. In the presentation, we report our results on broadband complex optical conductivity for all these materials, comparer their optical spectra, and conclude on the peculiarities of their low-energy band structure based on our experiments.