Inter-valley plasmons in graphene

Abstract

The spectrum of two-dimensional (2D) plasma waves in graphene has been recently studied in the Dirac fermion model. We take into account the whole dispersion relation for graphene electrons in the tight binding approximation and the local field effects in the electrodynamic response. Near the wavevectors close to the corners of the hexagon-shaped Brillouin zone we found new low-frequency 2D plasmon modes with a linear spectrum. These "inter-valley" plasmon modes are related to the transitions between the two nearest Dirac cones.

4 pages, 2 figures; submitted in PRL

References in corpus (8)

• The electronic properties of graphene
• Dielectric function, screening, and plasmons in 2D graphene
• Dynamical polarization of graphene at finite doping
• The Role of Electron-electron Interactions in Graphene ARPES Spectra
• Exotic plasmon modes of double layer graphene
• Linear plasmon dispersion in single-wall carbon nanotubes and the collective excitation spectrum of graphene
• Thermo-Plasma Polariton within Scaling Theory of Single-Layer Graphene
• Dielectric function and plasmons in graphene

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• Excitation spectrum and high energy plasmons in single- and multi-layer graphene
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• Dynamical screening in monolayer transition-metal dichalcogenides and its manifestations in the exciton spectrum
• Marrying excitons and plasmons in monolayer transition-metal dichalcogenides
• Theory of intervalley Coulomb interactions in monolayer transition-metal dichalcogenides
• Graphene in periodic deformation fields: dielectric screening and plasmons
• Triggering a global density wave instability in graphene via local symmetry-breaking
• Valley Plasmonics in the Dichalcogenides
• Dynamical current-current correlation of the hexagonal lattice and graphene
• Chiral symmetry and its manifestation in optical responses in graphene: interaction and multi-layers
• Valley relaxation in graphene due to charged impurities
• Optical Conductivity of Twisted Bilayer Graphene Near the Magic Angle
• Screening in graphene antidot lattices
• Spin and valley waves in Dirac semimetals with population imbalance
• Neutral Triplet Collective Mode in Doped Graphene