High-energy plasmon spectroscopy of freestanding multilayer graphene

Abstract

We present several applications of the layered electron gas model to electron energy loss spectroscopy of free-standing films consisting of $N$ graphene layers in a scanning transmission electron microscope. Using a two-fluid model for the single-layer polarizability, we discuss the evolution of high-energy plasmon spectra with $N$, and find good agreement with the recent experimental data for both multi-layer graphene with $N<10$, and thick slabs of graphite. Such applications of these analytical models help shed light on several features observed in the plasmon spectra of those structures, including the role of plasmon dispersion, dynamic interference in excitations of various plasmon eigenmodes, as well as the relevance of the bulk plasmon bands, rather than surface plasmons, in classifying the plasmon peaks.

11 pages, 6 figures. Accepted for publication in Phys. Rev. B

References in corpus (6)

• The electronic properties of graphene
• Plasmon-phonon coupling in graphene
• Casimir Forces and Graphene Sheets
• The effective fine structure constant of freestanding graphene measured in graphite
• Dynamic polarization of graphene by moving external charges: random phase approximation
• Anomalous Angular Dependence of the Dynamic Structure Factor near Bragg Reflections: Graphite

Cited by in corpus (12)

• Plasmons in graphene: Recent progress and applications
• Unusual reflection of electromagnetic radiation from a stack of graphene layers at oblique incidence
• Optical absorption and conductivity in quasi-two-dimensional crystals from first principles: Application to graphene
• Changing character of electronic transitions in graphene: From single particle excitations to plasmons
• Electron cascades and secondary electron emission in graphene under energetic ion irradiation
• Theoretical electron energy loss spectroscopy of isolated graphene
• Electrically tunable plasma excitations in AA-stacking multilayer graphene
• How Much Graphene in Space?
• Anisotropy of π-plasmon Dispersion Relation of AA-stacked Graphite
• Combined effect of doping and temperature on the anisotropy of low-energy plasmons in monolayer graphene
• Optical Properties of Graphene in Magnetic and Electric fields
• Ab initio study of angle-resolved electron reflection spectroscopy of few-layer graphene