Valley-Spin Polarization in the Magneto-Optical Response of Silicene and Other Similar 2D Crystals

Abstract

We calculate the magneto-optical conductivity and electronic density of states for silicene, the silicon equivalent of graphene, and similar crystals such as germanene. In the presence of a perpendicular magnetic field and electric field gating, we note that four spin- and valley-polarized levels can be seen in the density of states and transitions between these levels lead to similarly polarized absorption lines in the longitudinal, transverse Hall, and circularly polarized dynamic conductivity. While previous spin and valley-polarization predicted for the conductivity is only present in the response to circularly polarized light, we show that distinct spin- and valley-polarization can also be seen in the longitudinal magneto-optical conductivity at experimentally attainable energies. The frequency of the absorption lines may be tuned by the electric and magnetic field to onset in a range varying from THz to the infrared. This potential to isolate charge carriers of definite spin and valley label may make silicene a promising candidate for spin- and valleytronic devices.

6 pages, 5 figures

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Cited by in corpus (84)

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• Spin- and valley-dependent magneto-optical properties of MoS2
• Silicene on Ag(111): an honeycomb lattice without Dirac bands
• Dynamical Polarization Function, Plasmons and Screening in Silicene and Other Buckled Honeycomb Lattices
• Coexistence of multiple silicene phases in silicon grown on Ag(111)
• AC/DC Spin and Valley Hall Effects in Silicene and Germanene
• Magneto-optical transport properties of monolayer phosphorene
• Casimir Force Phase Transitions in the Graphene Family
• Spin and valley polarization of plasmons in silicene due to external fields
• Is Silicene the Next Graphene?
• Single-Valley Engineering in Graphene Superlattices
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• Magneto-optics of general pseudospin-s two-dimensional Dirac-Weyl fermions
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• Floquet Valley-Polarized Quantum Anomalous Hall State in Nonmagnetic Heterobilayers
• Efficient Dual Spin-Valley Filter In Strained Silicene
• Nonlocal Optical Response in Topological Phase Transitions in the Graphene Family
• H-Si bonding-induced unusual electronic properties of silicene: a method to identify hydrogen concentration
• Magneto-optical effects in the Landau level manifold of 2D lattices with spin-orbit interaction
• Prediction of group IV-V hexagonal binary monolayers
• Hexagonal warping on spin texture, Hall conductivity and circular dichroism of Topological Insulator
• Identifying topological-band insulator transitions in silicene and other 2D gapped Dirac materials by means of Rényi-Wehrl entropy
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• Controlling plasmon modes and damping in buckled two-dimensional material open systems
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• Novel Magnetic Quantization of sp${}^3$ Bonding in Monolayer Tinene
• Band inversion at critical magnetic fields in a silicene quantum dot
• Topological insulating phases from two-dimensional nodal loop semimetals
• Controllable photo-induced spin and valley filtering in silicene
• Electron spin inversion in gated silicene nanoribbons
• Magnetic Properties of Dirac Fermions in a Buckled Honeycomb Lattice
• Electron spin dynamics of two-dimensional layered materials
• The Haldane model under nonuniform strain
• Optical spectral weight: comparison of weak and strong spin-orbit coupling
• Optical Conductivity of Topological Insulator Thin Films in a Quantizing Magnetic Field
• Particle-hole asymmetry on Hall conductivity of a topological insulator
• Mechanically-controlled spin-selective transport
• Band-gap tuning and optical response of two-dimensional Si${}_x$C${}_{1-x}$: A first-principles real space study of disordered 2D materials
• Entropic uncertainty relations and topological-band insulator transitions in 2D gapped Dirac materials
• Particle-Hole Asymmetry in Gapped Topological Insulator Surface States
• Magnetic oscillations in silicene
• Nonlinear response in a non-centrosymmetric topological insulator
• Beating pattern in quantum magnetotransport coefficients of spin-orbit coupled Dirac fermions in gated silicene
• Composition and Stacking Dependent Topology in Bilayers from the Graphene Family
• Buckled honeycomb lattice and unconventional magnetic response
• Chern band insulators in magnetic field
• Valley-controlled transport in graphene/ WSe${}_2$ heterostructures under an off-resonant polarized light
• Controllable intrinsic DC spin/valley Hall conductivity in ferromagnetic silicene: Exploring a fully spin/valley polarized transport
• Unconventional optical selection rules in ZrTe5 under an in-plane magnetic field
• Electrical control of a confined electron spin in a silicene quantum dot
• Landau levels in spin-orbit coupling proximitized graphene: bulk states
• Orbital magnetic moments in insulating Dirac systems: Impact on magnetotransport in graphene van der Waals heterostructures
• Two-Dimensional Si-Ge Monolayers: Stabilities, Structures and Electronic Properties
• Orbital magneto-optical response of periodic insulators from first principles
• Magneto-optical conductivity of monolayer transition metal dichalcogenides in the presence of proximity-induced exchange interaction and external electrical field
• Electronic spectrum and optical properties of Y-shaped Kekule-patterned graphene: Band nesting resonance as an optical signature
• Quantum geometry and $X$-wave magnets with $X=p,d,f,g,i$
• Photo-induced spin and valley-dependent Seebeck effect in the low-buckled Dirac materials
• Faraday rotation and transmittance as markers of topological phase transitions in 2D materials
• Magnetizations and de Haas-van Alphen oscillations in massive Dirac fermions
• Electrically tunable magnetoplasmons in a monolayer of silicene or germanene
• Landau-level composition of bound exciton states in magnetic field
• Quantum revivals in HgTe/CdTe quantum wells and topological phase transitions
• Metallic behaviour in SOI quantum wells with strong intervalley scattering
• Quantum Hall ferromagnets and transport properties of buckled Dirac materials
• Optical Properties of Graphene in Magnetic and Electric fields
• Influence of Dynamical Floquet Spectrum on the Plasmon Excitations and Exchange Energy of tilted monolayer 1T${}^{\prime }$MoS${}_2$
• Anomalous Behaviour in the Magneto-Optics of a Gapped Topological Insulator
• Cyclotron Resonance in Topological Insulators: Non-Relativistic Effects
• Anomalous Transition Magnetic Moments in two-dimensional Dirac Materials
• Detection of topological states in two-dimensional Dirac systems by the dynamic spin susceptibility
• Magnetic quantization in multilayer graphenes
• Two-dimensional bound excitons in real space and Landau quantization space: A comparative study
• Emerging nonlinear Hall effect in Kane-Mele two-dimensional topological insulators
• Plasmon damping rates in Coulomb-coupled two-dimensional layers in a heterostructure