Magneto-optical probe of the fully gapped Dirac band in ZrSiS

E. Uykur, L. Z. Maulana, L. M. Schoop, B. V. Lotsch, M. Dressel, A. V. Pronin

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8 Scopus citations


We present a far-infrared magneto-optical study of the gapped nodal-line semimetal ZrSiS in magnetic fields B up to 7 T. The observed field-dependent features, which represent intra- (cyclotron resonance) and interband transitions, develop as B in increasing field and can be consistently explained within a simple two-dimensional Dirac band model with a gap of 26 meV and an averaged Fermi velocity of 3×105 m/s. This indicates a rather narrow distribution of these parameters along the in-plane portions of the nodal line in the Brillouin zone. A field-induced feature with an energy position that does not depend on B is also detected in the spectra. Possible origins of this feature are discussed.

Original languageEnglish (US)
Article number032015
JournalPhysical Review Research
Issue number3
StatePublished - Nov 2019

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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