Many-Body Effects and Optical Properties of Single- and Double Layer $\alpha$-${\mathcal{T}}_3$ Lattices

Abstract

An extensive analytical and numerical investigation has been carried out to examine the role played by many-body effects on various $\alpha$-${\mathcal{T}}_3$ materials under an off-resonance optical dressing field. Additionally, we explore its dependence on the hopping parameter $\alpha$ as well as the electron-light coupling strength ${\lambda }_0$. The obtained dressed states due to mutual interaction between Dirac electrons and incident light are shown to demonstrate rather different electronic and optical properties in comparison with those in the absence of incident light. Specifically, various collective transport and optical properties of these electron dressed states are discussed in detail and compared for both single- and double layer $\alpha$-${\mathcal{T}}_3$ lattices. All of these novel properties are due to the presence of a middle flat band and the interband transitions between it and an upper conduction band. Also, coupled plasmon dispersions for interacting double layer $\alpha$-${\mathcal{T}}_3$ lattices are calculated, revealing a lower acoustic-like plasmon branch with tunable group velocity determined by both the layer separation and Fermi energy of each layer. Finally, a many-body theory is presented within the random-phase approximation for calculating the optical absorbance of doped multi-layered $\alpha$-${\mathcal{T}}_3$ lattices in a linearly-polarized light field. We anticipate that the discoveries reported here could impact the design of the next-generation nano-optical and nano-plasmonic devices.

arXiv comment16 pages, 10 figures

References in corpus (51)

• The electronic properties of graphene
• Dielectric function, screening, and plasmons in 2D graphene
• Dynamical polarization of graphene at finite doping
• Valley-Polarized Metals and Quantum Anomalous Hall Effect in Silicene
• 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
• Experimental realization and characterization of an electronic Lieb lattice
• Nearly flat band with Chern number C=2 on the dice lattice
• Screening induced temperature dependent transport in 2D graphene
• From dia- to paramagnetic orbital susceptibility of Dirac cones
• Metal-insulator transition in graphene induced by circularly polarized photons
• How to escape Aharonov-Bohm cages ?
• Plasmons and screening in a monolayer of MoS${}_2$
• All-optical band engineering of gapped Dirac materials
• Magnetic properties of the $\alpha$-$T_3$ model: magneto-optical conductivity and the Hofstadter butterfly
• Correlated phases of bosons in the flat lowest band of the dice lattice
• Dynamical Polarization Function, Plasmons and Screening in Silicene and Other Buckled Honeycomb Lattices
• Control of electronic transport in graphene by electromagnetic dressing
• Intrinsic plasmons in 2D Dirac materials
• Peculiar electronic states, symmetries and Berry phases in irradiated $\alpha$-$T_3$ materials
• Frequency-dependent polarizability, plasmons, and screening in the 2D pseudospin-1 dice lattice
• Photoinduced valley and electron-hole symmetry breaking in $\alpha$-$T_3$ lattice: The role of a variable Berry phase
• Magnetotransport properties of the $\alpha$-T${}_3$ model
• Floquet topological phase transition in $\alpha$-${\mathcal{T}}_3$ lattice
• Valley engineering by strain in Kekulé-distorted graphene
• Dissipationless electron transport in photon-dressed nanostructures
• Electron states for gapped pseudospin-1 fermions in the field of charged impurity
• Optical Kagome lattice for ultra-cold atoms with nearest neighbor interactions
• Topology-induced phase transitions in quantum spin Hall lattices
• Quantum-statistical theory for laser-tuned transport and optical conductivities of dressed electrons in $α-\mc{T}_3$ materials
• Optically induced Lifshitz transition in bilayer graphene
• Photon dressed electronic states in topological insulators: Tunneling and conductance
• Electronic states of pseudospin-1 fermions in dice lattice ribbons
• Exploring the Optical States for Black Phosphorus: Anisotropy and Bandgap Tuning
• Interplay of Lorentz-Berry forces in position-momentum spaces for valley-dependent impurity scattering in alpha-T3 lattices
• Plasmon dissipation in gapped-graphene open systems at finite temperature
• Finite temperature dynamical polarization and plasmons in gapped graphene
• Nonlinear transport of ballistic Dirac electrons tunneling through a tunable potential barrier in graphene
• Controlling plasmon modes and damping in buckled two-dimensional material open systems
• Photoinduced interfacial chiral modes in threefold topological semimetal
• Quantum-Electron Back Action on Hybridization of Radiative and Evanescent Field Modes
• Optically induced topological states on the surface of mercury telluride
• Collective plasmonic excitations in double-layer silicene at finite temperature
• Transverse current current response of graphene at finite temperature, plasmons and absorption
• Role played by strain on Plasmons, screening and energy loss in Graphene/substrate contacts
• Effect of Energy Band Gap in Graphene on Negative Refraction through the Veselago Lens and Electron Conductance
• Floquet engineering of Dirac cones on the surface of a topological insulator
• Modeling Anisotropic Plasmon Excitations in Self-Assembled Fullerenes
• Band Tuning of Phosphorene Semiconductor via Floquet Theory
• On the possibility of a terahertz light emitting diode based on a dressed quantum well

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• Stackings and effective models of bilayer dice lattices
• Optical conductivity of bilayer dice lattices
• Effect of magnetic field on the electronic properties of an $\alpha$-$T_3$ ring
• Orbital magnetization senses the topological phase transition in a spin-orbit coupled $\alpha$-$T_3$ system
• Electronic spectrum and optical properties of Y-shaped Kekule-patterned graphene: Band nesting resonance as an optical signature
• Developing a semiclassical Wentzel-Kramers-Brillouin theory for $\alpha -{\mathcal{T}}_3$ model
• Coherent-scatterer enhancement and Klein-tunneling suppression by potential barriers in gapped graphene with chirality-time-reversal symmetry