Lorentz-boost-driven magneto-optics in a Dirac nodal-line semimetal

Abstract

Optical response of crystalline solids is to a large extent driven by excitations that promote electrons among individual bands. This allows one to apply optical and magneto-optical methods to determine experimentally the energy band gap - a fundamental property crucial to our understanding of any solid - with a great precision. Here we show that such conventional methods, applied with great success to many materials in the past, do not work in topological Dirac semimetals with a dispersive nodal line. There, the optically deduced band gap depends on how the magnetic field is oriented with respect to the crystal axes. Such highly unusual behaviour is explained in terms of band-gap renormalization driven by Lorentz boosts.

9 pages, 3 figures + supplementary materials

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Cited by in corpus (12)

• Mesoscopic Klein-Schwinger effect in graphene
• Semi-Dirac Fermions in a Topological Metal
• Lorentz-boost-driven magneto-optics in a Dirac nodal-line semimetal
• Evidence of 3D Dirac conical bands in TlBiSSe by optical and magneto-optical spectroscopy
• 2D Weyl Materials in the Presence of Constant Magnetic Fields
• Magneto-optical response of the Weyl semimetal NbAs: Experimental results and hyperbolic-band computations
• Exchange gap in GdPtBi probed by magneto-optics
• Appearance of Odd-Frequency Superconductivity in a Relativistic Scenario
• Magneto-optical evidence of tilting effect in coupled Weyl bands
• Unveiling three types of fermions in a nodal ring topological semimetal through magneto-optical transitions
• Isotropic Dirac fermion and anomalous oscillator strength of zeroth Landau level transition
• Temperature inhomogeneity in non-equilibrium field theory for electrons in a nanowire: thermodynamic and transport properties