Core-level spectra from graphene

Abstract

We calculate core-level spectra for pristine and doped free-standing graphene sheets. Instructions for how to perform the calculations are given in detail. Although pristine graphene is not metallic the core-level spectrum presents low-energy tailing which is characteristic of metallic systems. The peak shapes vary with doping level in a characteristic way. The spectra are compared to experiments and show good agreement. We compare to two different pristine samples and to one doped sample. The pristine samples are one with quasi-free-standing epitaxial graphene on SiC obtained by hydrogen intercalation and one with a suspended graphene sheet. The doped sample is a gold supported graphene sheet. The gold substrate acts as an acceptor so the graphene sheet gets p-doped.

9 pages, 7 figures

References in corpus (7)

• Dielectric function, screening, and plasmons in 2D graphene
• Dynamical polarization of graphene at finite doping
• Non-Fermi liquid behaviour of electrons in the half-filled honeycomb lattice (A renormalization group approach)
• Retarded interactions in Graphene systems
• Casimir interactions in graphene systems
• Core level spectra in XPS of pristine and doped graphene
• Graphene on Au-coated SiOx substrate: Its core-level photoelectron micro-spectroscopy study

Cited by in corpus (6)

• Introducing strong correlation effects into graphene by gadolinium intercalation
• Freestanding n-Doped Graphene via Intercalation of Calcium and Magnesium into the Buffer Layer - SiC(0001) Interface
• Momentum microscopy of Pb-intercalated graphene on SiC: charge neutrality and electronic structure of interfacial Pb
• Ultrafast electronic line width broadening in the C 1s core level of graphene
• Extended characterization methods for covalent functionalization of graphene on copper
• Core-level spectra from bilayer graphene