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

Abstract

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 $\sqrt{B}$ in increasing field and can be consistently explained within a simple 2D Dirac band model with a gap of 26 meV and an averaged Fermi velocity of $3\times 10^5$ 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.

arXiv commentaccepted to Phys. Rev. Research

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Cited by in corpus (8)

• Semi-Dirac Fermions in a Topological Metal
• Nodal Semimetals: A Survey on Optical Conductivity
• Generalized Design Principles for Hydrodynamic Electron Transport in Anisotropic Metals
• Crossing points of nodal lines in topological semimetals and Fermi surface of ZrSiS
• Unveiling three types of fermions in a nodal ring topological semimetal through magneto-optical transitions
• Nodal-line driven anomalous susceptibility in ZrSiS
• Landau level spectroscopy in current solid state physics
• In-Situ Polarimetry in Collimated Magneto-Infrared Spectroscopy System