SKM 2023 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 6: Topological Semimetals
TT 6.5: Vortrag
Montag, 27. März 2023, 10:30–10:45, HSZ 304
Landau levels in NbAs as seen in magneto-optics: experiment versus modeling — S. Polatkan1, M. Orlita2, C. Shekhar3, C. Felser3, M. Dressel1, and •A. V. Pronin1 — 11. Physikalisches Institut, Universität Stuttgart, 70569 Stuttgart, Germany — 2LNCMI, CNRS-UGA-UPS-INSA-EMFL, 38042 Grenoble, France — 3Max-Planck-Institut für Chemische Physik fester Stoffe, 01187 Dresden, Germany
We measured the inter-Landau-level transitions the Weyl semimetal NbAs in magneto-optical experiments and found that the fits with pure Weyl bands do not lead to a satisfactory agreement between theory and experiment. We thus propose a coupled hyperbolic band model, supplemented by detailed 2D band structure cuts, attributing a secondary role to the presence of Weyl points. We argue that this minimalist model is sufficient to describe the measured magneto-optical spectra.