Optical conductivity of bilayer dice lattices

Abstract

We calculate optical conductivity for bilayer dice lattices in commensurate vertically aligned stackings. The interband optical conductivity reveals a rich activation behavior unique for each of the four stackings. We found that the intermediate energy band, which corresponds to the flat band of a single-layer dice lattice, plays a different role for different stackings. The interband selection rules, which are crucial for the single-layer lattice, may become lifted in bilayer lattices. The results for effective and tight-binding models are found to be in qualitative agreement for some of the stackings and the reasons for the discrepancies for others are identified. Our findings propose optical conductivity as an effective tool to distinguish between different stackings in bilayer dice lattices.

arXiv comment22 pages, 14 multi-panel figures

References in corpus (56)

• Universal Dynamic Conductivity and Quantized Visible Opacity of Suspended Graphene
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Moire bands in twisted double-layer graphene
• Type-II Weyl Semimetals
• Weyl Semimetal in a Topological Insulator Multilayer
• Graphene bilayer with a twist: electronic structure
• Beyond Dirac and Weyl fermions: Unconventional quasiparticles in conventional crystals
• Flat Bands in Slightly Twisted Bilayer Graphene
• Unusual Microwave Response of Dirac Quasiparticles in Graphene
• Artificial flat band systems: from lattice models to experiments
• Transport of Dirac quasiparticles in graphene: Hall and optical conductivities
• Aharonov-Bohm cages in two-dimensional structures
• Giant anisotropic nonlinear optical response in transition metal monopnictide Weyl semimetals
• Charge Transport in Weyl Semimetals
• Discovery of topological chiral crystals with helicoid arc states
• New classes of chiral topological nodes with non-contractible surface Fermi arcs in CoSi
• Optical and magneto-optical far-infrared properties of bilayer graphene
• Observation of Chiral Fermions with a Large Topological Charge and and Associated Fermi-Arc Surface States in CoSi
• Structured Weyl Points in Spin-Orbit Coupled Fermionic Superfluids
• Chiral Topological Semimetal with Multifold Band Crossings and Long Fermi arcs
• Zero modes of tight binding electrons on the honeycomb lattice
• From dia- to paramagnetic orbital susceptibility of Dirac cones
• Massless Dirac-Weyl Fermions in a T_3 Optical Lattice
• Chiral Optical Response of Multifold Fermions
• Chiral anomaly and optical absorption in Weyl semimetals
• Optical Signatures of Weyl Points in TaAs
• Interband optical conductivity of the [001]-oriented Dirac semimetal Cd3As2
• Hall quantization and optical conductivity evolution with variable Berry phase in $\alpha$-$T_3$ model
• Magnetic properties of the $\alpha$-$T_3$ model: magneto-optical conductivity and the Hofstadter butterfly
• Peculiar electronic states, symmetries and Berry phases in irradiated $\alpha$-$T_3$ materials
• Phase Diagram of the Bose-Hubbard Model with T_3 symmetry
• Frequency-dependent polarizability, plasmons, and screening in the 2D pseudospin-1 dice lattice
• Magnetotransport properties of the $\alpha$-T${}_3$ model
• Minimal conductivity, topological Berry winding and duality in three-band semimetals
• Electron states for gapped pseudospin-1 fermions in the field of charged impurity
• Optical signatures of multifold fermions in the chiral topological semimetal CoSi
• 3D Dirac cone carrier dynamics in Na3Bi and Cd3As2
• Frequency dependent magneto-optical conductivity in the generalized $\alpha -T_3$ model
• Optical properties of a semi-Dirac material
• Linear optical conductivity of chiral multifold fermions
• Dynamics of electric transport in interacting Weyl semimetals
• Magneto-optics of general pseudospin-s two-dimensional Dirac-Weyl fermions
• Vortex correlations in a fully frustrated two-dimensional superconducting network
• Probing Topological signatures in an optically driven $\alpha$-$T_3$ Lattice
• Finite-temperature plasmons, damping and collective behavior for $\alpha -{\mathcal{T}}_3$ model
• Optical conductivity of semi-Dirac and pseudospin-1 models: Zitterbewegung approach
• Many-Body Effects and Optical Properties of Single- and Double Layer $\alpha$-${\mathcal{T}}_3$ Lattices
• Optical response of two-dimensional Dirac materials with a flat band
• Nodal Semimetals: A Survey on Optical Conductivity
• Dynamical optical conductivity for gapped $\alpha -{\mathcal{T}}_3$ materials with a curved "flat" band
• Skin effect as a probe of transport regimes in Weyl semimetals
• Quantum transport in flat bands and super-metallicity
• Stackings and effective models of bilayer dice lattices
• Anomalous Electromagnetic Field Penetration in a Weyl or Dirac Semimetal
• Coulomb impurity on a Dice lattice: atomic collapse and bound states
• Optical conductivity of triple point fermions

Cited by in corpus (6)

• Stackings and effective models of bilayer dice lattices
• Flat bands and magnetism in $\mathbf{F}{\mathbf{e}}_4\mathbf{GeT}{\mathbf{e}}_2$ and $\mathbf{F}{\mathbf{e}}_5\mathbf{GeT}{\mathbf{e}}_2$ due to bipartite crystal lattices
• Moiré semiconductors on twisted bilayer dice lattice
• Generation of isolated flat bands with tunable numbers through Moiré engineering
• Emergent topology of flat bands in a twisted bilayer $\alpha$-$T_3$ lattice
• Geometry-Driven Moiré Engineering in Twisted Bilayers of High-Pseudospin Fermions