Electrodynamic response of type II Weyl semimetals

Abstract

Weyl fermions play a major role in quantum field theory but have been quite elusive as fundamental particles. Materials based on quasi two-dimensional bismuth layers were recently designed and provide an arena for the study of the interplay between anisotropic Dirac fermions, magnetism and structural changes, allowing the formation of Weyl fermions in condensed matter. Here, we perform an optical investigation of YbMnBi${}_2$, a representative type II Weyl semimetal, and contrast its excitation spectrum with the optical response of the more conventional semimetal EuMnBi${}_2$. Our comparative study allows us disentangling the optical fingerprints of type II Weyl fermions, but also challenge the present theoretical understanding of their electrodynamic response.

References in corpus (28)

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• Topological Insulators
• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Type-II Weyl Semimetals
• Topological nodal semimetals
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• Chern semi-metal and Quantized Anomalous Hall Effect in HgCr2Se4
• Spectroscopic evidence for type II Weyl semimetal state in MoTe2
• Charge Transport in Weyl Semimetals
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• Anisotropic Dirac fermions in a Bi square net of SrMnBi2
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• Optical spectroscopy study of three dimensional Dirac semimetal ZrTe${}_5$
• Optical evidence for a Weyl semimetal state in pyrochlore Eu2Ir2O7
• Chiral anomaly and optical absorption in Weyl semimetals
• Three-dimensional Dirac fermions in quasicrystals as seen via optical conductivity
• Optical Signatures of Weyl Points in TaAs
• Quantum transport of two-dimensional Dirac fermions in SrMnBi2
• Two dimensional Dirac fermions and quantum magnetoresistance in CaMnBi${}_2$
• Anisotropic Dirac electronic structures of AMnBi${}_2$ (A=Sr, Ca)
• Magneto-optical signature of massless Kane electrons in Cd3As2
• Interband optical conductivity of the [001]-oriented Dirac semimetal Cd3As2
• Effect of Eu magnetism on the electronic properties of the candidate Dirac material EuMnBi2
• Optical Conductivity of Weyl Semimetals and Signatures of the Gapped Semimetal Phase Transition
• Optical properties of the perfectly compensated semimetal WTe${}_2$
• Two-dimensional Dirac fermions in YbMnBi2 antiferromagnet

Cited by in corpus (27)

• Weyl and Dirac Semimetals in Three Dimensional Solids
• Topological Semimetals in Square-Net Materials
• Epsilon-Near-Zero Response and Tunable Perfect Absorption in Weyl Semimetals
• Topological Weyl and Node-Line Semimetals in Ferromagnetic Vanadium-Phosphorous-Oxide $\beta$-V${}_2$OPO${}_4$ Compound
• Optical properties of a semi-Dirac material
• Transport and optics at the node in a nodal loop semimetal
• Optical signature of Weyl electronic structures in tantalum pnictides Ta$Pn$ ($Pn=$ P, As)
• Magnetic and electronic structure of Dirac semimetal candidate EuMnSb${}_2$
• An optical investigation of the strong spin-orbital coupled magnetic semimetal YbMnBi${}_2$
• Absorption of circular polarized light in tilted Type-I and II Weyl semimetals
• Observation of Magnetopiezoelectric Effect in Antiferromagnetic Metal EuMnBi2
• Doping and tilting on optics in noncentrosymmetric multi-Weyl semimetals
• Observation of topological nodal-line semimetal in YbMnSb2 through optical spectroscopy
• Magnetic structure and excitations of the topological semimetal YbMnBi${}_2$
• The dynamics of local magnetic moments induced by itinerant Weyl electrons
• Non-trivial topology in a layered Dirac nodal-line semimetal candidate SrZnSb${}_2$ with distorted Sb square nets
• Nodal Semimetals: A Survey on Optical Conductivity
• Imaginary part of Hall conductivity in tilted doped Weyl semimetal with both broken time reversal and inversion symmetry
• Signatures of coupling between spin waves and Dirac fermions in YbMnBi${}_2$
• Infrared spectroscopic studies of the topological properties in CaMnSb2
• Anomalous DC Hall response in noncentrosymmetric tilted Weyl semimetals
• Prediction of Double-Weyl Points in the Iron-Based Superconductor CaKFe${}_4$As${}_4$
• Origin of the Type-II Weyl state in topological antiferromagnetic YbMnBi2
• Spin dynamics of a magnetic Weyl semimetal Sr${}_{1-x}$Mn${}_{1-y}$Sb${}_2$
• Optical conductivity of the type-II Weyl semimetal WTe${}_2$ under pressure
• Optical response in Weyl semimetal in model with gapped Dirac phase
• Coupling of magnetism and Dirac fermions in YbMnSb2