SKM 2023 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 6: Topological Semimetals

TT 6.5: Talk

Monday, March 27, 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.