Optical properties of two dimensional Dirac Weyl materials with a flatband
arXiv:2402.14238 · doi:10.1063/5.0178936
Abstract
The emergence of a flat band in Dirac-Weyl materials offers new possibilities for electronic transitions, leading to stronger interaction with light. As a result, the optical conductivity can be significantly enhanced in these flat-band materials as compared with graphene, making them potentially better candidates for optical sensing and modulation. Recently, a comprehensive theory for the optical conductivity of a spectrum of flat-band Dirac-Weyl materials has been developed, with explicit formulas for both the real and imaginary parts of the conductivity derived through two independent approaches. This Perspective offers a review of the development. An understanding of the optical properties of the flat-band Dirac-Weyl materials paves the way for optical device applications in the terahertz-frequency domain.
8 pages, 3 figures, journal
References in corpus (72)
- Graphene plasmonics
- Dyadic Green's Functions and Guided Surface Waves for a Surface Conductivity Model of Graphene
- Plasmonics in graphene at infra-red frequencies
- Dirac semimetal in three dimensions
- Mid-infrared frequency combs
- Beyond Dirac and Weyl fermions: Unconventional quasiparticles in conventional crystals
- Total light absorption in graphene
- High temperature fractional quantum Hall states
- The optical conductivity of graphene in the visible region of the spectrum
- A new electromagnetic mode in graphene
- Space-time dispersion of graphene conductivity
- Realization of an all-dielectric zero-index optical metamaterial
- Observation of a localized flat-band state in a photonic Lieb lattice
- Observation of bound states in Lieb photonic lattices
- Topological insulator on the kagome lattice
- Artificial flat band systems: from lattice models to experiments
- Edge and waveguide THz surface plasmon modes in graphene micro-ribbons
- Aharonov-Bohm cages in two-dimensional structures
- Octave Spanning Frequency Comb on a Chip
- Experimental realization and characterization of an electronic Lieb lattice
- Coherent driving and freezing of bosonic matter wave in an optical Lieb lattice
- Topological states in engineered atomic lattices
- Do Linear Dispersions of Classical Waves Mean Dirac Cones?
- Topological Insulators on the Lieb and Perovskite Lattices
- Nearly flat band with Chern number C=2 on the dice lattice
- 3D massless Kane fermions observed in a zinc-blende crystal
- From dia- to paramagnetic orbital susceptibility of Dirac cones
- Experimental observation of bulk and edge transport in photonic Lieb lattices
- Detection of very small neutrino masses in double-beta decay using laser tagging
- Experimental observation of Aharonov-Bohm cages in photonic lattices
- Massless Dirac-Weyl Fermions in a T_3 Optical Lattice
- Flat bands, Dirac cones and atom dynamics in an optical lattice
- Lattice generalization of the Dirac equation to general spin and the role of the flat band
- Isolated Flat Bands and Spin-1 Conical Bands in Two-Dimensional Lattices
- Hall effect of triplons in a dimerized quantum magnet
- Petahertz optical response in graphene
- Observation of localized flat-band modes in a quasi-one-dimensional photonic rhombic lattice
- Blue Phosphorene Oxide: Strain-tunable Quantum Phase Transitions and Novel 2D Emergent Fermions
- Topological Maxwell Metal Bands in a Superconducting Qutrit
- Magneto-optics of massless Kane fermions: Role of the flat band and unusual Berry phase
- Klein tunneling and supercollimation of pseudospin-1 electromagnetic waves
- Strong mid-infrared photoresponse in small-twist-angle bilayer graphene
- Three-dimensional Pentagon Carbon with a genesis of emergent fermions
- Localized plasmons in graphene-coated nanospheres
- Temperature-driven massless Kane fermions in HgCdTe crystals: verification of universal velocity and rest-mass description
- Hall quantization and optical conductivity evolution with variable Berry phase in - model
- Optical conductivity, Drude weight and plasmons in twisted graphene bilayers
- Flat-Bands-Enabled Triplet Excitonic Insulator in a Di-atomic Kagome Lattice
- Spectral and transport properties of the two-dimensional Lieb lattice
- Triplet Fermions and Dirac Fermions in Borophene
- Phase Diagram of the Bose-Hubbard Model with T_3 symmetry
- Chiral plasmons with twisted atomic bilayers
- Optical conductivity of disordered graphene beyond the Dirac cone approximation
- Emergent pseudospin-1 Maxwell fermions with a threefold degeneracy in optical lattices
- Kekule' textures, pseudo-spin one Dirac cones and quadratic band crossings in a graphene-hexagonal indium chalcogenide bilayer
- Frequency dependent magneto-optical conductivity in the generalized model
- Triple point fermions in a minimal symmorphic model
- Effect of Coulomb interactions on the optical properties of doped graphene
- Transmission through quantum networks
- Rashba effect in quantum networks
- Anomalous Dirac Plasmons in 1D Topological Electrides
- Tunable deep-subwavelength superscattering using graphene monolayers
- Weyl points created by a three-dimensional flat band
- Excitonic Condensate in Flat Valence and Conduction Bands of Opposite Chirality
- Symmetry breaking and circular photogalvanic effect in epitaxial CdHgTe films
- Density-independent plasmons for terahertz-stable topological metamaterials
- Optical response of two-dimensional Dirac materials with a flat band
- Excited quantum Hall effect: enantiomorphic flat bands in a Yin-Yang Kagome lattice
- Dynamical optical conductivity for gapped materials with a curved "flat" band
- Non-equilibrium transport in the pseudospin-1 Dirac-Weyl system
- Emergent scale invariance of non-classical plasmons in graphene nanoribbons
- Generating extreme quantum scattering in graphene with machine learning