The effect of perpendicular electric field on temperature-induced plasmon excitations for intrinsic silicene

Wu, Jhao Ying; Lin, Chiun-Yan; Gumbs, Godfrey; Lin, Ming–Fa

doi:10.1039/c5ra07721d

Cited by 14 publications

(15 citation statements)

References 62 publications

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“…The conical dispersion is unambiguous evidence for the existence of Dirac fermions in the silicon ad-layer indicating that the silicon atoms have sp 2 hybridization and hence have silicene characteristics. A single sp 2 band is observed without any spin-orbit splitting, although this latter was expected in recent theoretical studies3031. The failure to detect such a splitting is probably due to the limited angle and energy ARPES resolutions.…”

mentioning

confidence: 63%

Compelling experimental evidence of a Dirac cone in the electronic structure of a 2D Silicon layer

Sadeddine

Enriquez

Bendounan

et al. 2017

Sci Rep

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The remarkable properties of graphene stem from its two-dimensional (2D) structure, with a linear dispersion of the electronic states at the corners of the Brillouin zone (BZ) forming a Dirac cone. Since then, other 2D materials have been suggested based on boron, silicon, germanium, phosphorus, tin, and metal di-chalcogenides. Here, we present an experimental investigation of a single silicon layer on Au(111) using low energy electron diffraction (LEED), high resolution angle-resolved photoemission spectroscopy (HR-ARPES), and scanning tunneling microscopy (STM). The HR-ARPES data show compelling evidence that the silicon based 2D overlayer is responsible for the observed linear dispersed feature in the valence band, with a Fermi velocity of comparable to that of graphene. The STM images show extended and homogeneous domains, offering a viable route to the fabrication of silicene-based opto-electronic devices.

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mentioning

confidence: 63%

Compelling experimental evidence of a Dirac cone in the electronic structure of a 2D Silicon layer

Sadeddine

Enriquez

Bendounan

et al. 2017

Sci Rep

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“…The complicated Coulomb screening in multilayer graphene can be characterized by the dielectric-function matrix. [131][132][133][134][135][136][137] Such characteristics are further diversified by the distinct stacking configurations. As a result, the interlayer e-e interactions, the interlayer atomic interactions and the magnetic field are simultaneously included in the calculations of Coulomb excitation spectra.…”

Section: Magneto Plasmonsmentioning

confidence: 99%

“…1,2 The particular electronic properties and the high carrier mobility (up to 15 000 cm 2 V À1 s À1 ) 3-9 make this new material a promising candidate for next-generation nano-devices. 21 These low-dimensional systems have been a focus of intense interest in the areas of electronic properties, optical properties, [46][47][48]55,64,65, Coulomb excitations [125][126][127][128][129][130][131][132][133][134][135][136][137] and quantum Hall transport properties. 21 These low-dimensional systems have been a focus of intense interest in the areas of electronic properties, optical properties, [46][47][48]55,64,65, Coulomb excitations [125][126][127][128][129][130][131][132][133][134][135][136][137] and quantum Hall transport properties.…”

Section: Introductionmentioning

confidence: 99%

Magneto-electronic properties of multilayer graphenes

Lin

et al. 2015

Phys. Chem. Chem. Phys.

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This article reviews the rich magneto-electronic properties of multilayer graphene systems. Multilayer graphenes are built from graphene sheets attracting one another by van der Waals forces; the magneto-electronic properties are diversified by the number of layers and the stacking configurations. For an N-layer system, Landau levels are divided into N groups, with each identified by a dominant sublattice associated with the stacking configuration. We focus on the main characteristics of Landau levels, including the degeneracy, wave functions, quantum numbers, onset energies, field-dependent energy spectra, semiconductor-metal transitions, and crossing patterns, which are reflected in the magneto-optical spectroscopy, scanning tunneling spectroscopy, and quantum transport experiments. The Landau levels in AA-stacked graphene are responsible for multiple Dirac cones, while in AB-stacked graphene the Dirac properties depend on the number of graphene layers, and in ABC-stacked graphene the low-lying levels are related to surface states. The Landau-level mixing leads to anticrossings patterns in energy spectra, which are seen for intergroup Landau levels in AB-stacked graphene, while in particular, a formation of both intergroup and intragroup anticrossings is observed in ABC-stacked graphene. The aforementioned magneto-electronic properties lead to diverse optical spectra, plasma spectra, and transport properties when the stacking order and the number of layers are varied. The calculations are in agreement with optical and transport experiments, and novel features that have not yet been verified experimentally are presented.

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“…The single-layer graphene and silicene can exhibit an acoustic plasmon with a square-root dependence on the transferred momentum under the finite temperature4150 and Fermi energy46474851. Furthermore, the excitation spectra of the buckled silicene are enriched by V z 51525354. In addition, the π and π + σ plasmons, which, respectively, come from the valence π and π + σ electrons are also investigated in detail49.…”

mentioning

confidence: 99%

Coulomb excitations of monolayer germanene

Shih

Chiu

et al. 2017

Sci Rep

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The feature-rich electronic excitations of monolayer germanene lie in the significant spin-orbit coupling and the buckled structure. The collective and single-particle excitations are diversified by the magnitude and direction of transferred momentum, the Fermi energy and the gate voltage. There are four kinds of plasmon modes, according to the unique frequency- and momentum-dependent phase diagrams. They behave as two-dimensional acoustic modes at long wavelength. However, for the larger momenta, they might change into another kind of undamped plasmons, become the seriously suppressed modes in the heavy intraband e–h excitations, keep the same undamped plasmons, or decline and then vanish in the strong interband e–h excitations. Germanene, silicene and graphene are quite different from one another in the main features of the diverse plasmon modes.

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The effect of perpendicular electric field on temperature-induced plasmon excitations for intrinsic silicene

Cited by 14 publications

References 62 publications

Compelling experimental evidence of a Dirac cone in the electronic structure of a 2D Silicon layer

Compelling experimental evidence of a Dirac cone in the electronic structure of a 2D Silicon layer

Magneto-electronic properties of multilayer graphenes

Coulomb excitations of monolayer germanene

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