Finding the bare band: Electron coupling to two phonon modes in potassium-doped graphene on Ir(111)

@article{Pletikosic2012FindingTB,
  title={Finding the bare band: Electron coupling to two phonon modes in potassium-doped graphene on Ir(111)},
  author={Ivo Pletikosi'c and Marko Kralj and Milorad Milun and Petar Pervan},
  journal={Physical Review B},
  year={2012},
  volume={85},
  pages={155447}
}
We analyze renormalization of the pi band of n-doped epitaxial graphene on Ir(111) induced by electron-phonon coupling. Our procedure of extracting the bare band relies on recursive self-consistent refining of the functional form of the bare-band until the convergence. We demonstrate that the components of the self-energy, as well as the spectral intensity obtained from angle-resolved photoelectron spectroscopy (ARPES) show that the renormalization is due to the coupling to two distinct phonon… Expand
Anisotropic Eliashberg function and electron-phonon coupling in doped graphene
We investigate, with high-resolution angle-resolved photoemission spectroscopy, the spectral function of potassium-doped quasi-free-standing graphene on Au. Angle-dependent x-ray photoemission andExpand
Electron-phonon coupling in quasi-free-standing graphene.
TLDR
The electron-phonon coupling is found to be so weak that it renders the precise determination of the coupling constant λ through renormalization difficult, and the estimated value of λ is 0.05(3) for both systems. Expand
Enhancement of electron-phonon coupling in Cs-overlayered intercalated bilayer graphene.
TLDR
High-resolution angle-resolved photoemission spectroscopy on cesium (Cs) intercalated bilayer graphene with a Cs overlayer finds anisotropic electron-phonon coupling with an estimated strength much larger than that of other doped graphenes, and comparable to superconducting bulk GICs. Expand
Tight-binding electron–phonon coupling and band renormalization in graphene
The kink structure in the quasiparticle spectrum of electrons in graphene observed at 200 meV below the Fermi level by angle-resolved photoemission spectroscopy (ARPES) was claimed to be caused by aExpand
Oxygen switching of the epitaxial graphene-metal interaction.
TLDR
These findings demonstrate that oxygen intercalation is an efficient method for fully decoupling an extended layer of graphene from a metal substrate, such as Ir(111), and pave the way for the fundamental research on graphene. Expand
Mini-Dirac cones in the band structure of a copper intercalated epitaxial graphene superlattice
The electronic band structure of an epitaxial graphene superlattice, generated by intercalating a monolayer of Cu atoms, is directly imaged by angle-resolved photoelectron spectroscopy. The 3.2 nmExpand
Exploring electronic structure of one-atom thick polycrystalline graphene films: A nano angle resolved photoemission study
TLDR
A high resolution angle and lateral resolved photoelectron spectroscopy (nano-ARPES) study of one-atom thick graphene films on thin copper foils synthesized by chemical vapor deposition shows the robustness of the Dirac relativistic-like electronic spectrum as a function of the size, shape and orientation of the single-crystal pristine grains in the graphene films investigated. Expand
Energy-Dependent Chirality Effects in Quasifree-Standing Graphene.
TLDR
It is suggested that higher order electron hopping effects are a key factor in breaking the chirality near to the van Hove singularity. Expand
Sequential oxygen and alkali intercalation of epitaxial graphene on Ir(111): enhanced many-body effects and formation of pn-interfaces
High quality epitaxial graphene films can be applied as templates for tailoring graphene–substrate interfaces that allow for precise control of the charge carrier behavior in graphene through dopingExpand
‘True’ bosonic coupling strength in strongly correlated superconductors
TLDR
It is demonstrated that the conventional procedure underestimates the electron-boson coupling depending on the electrons-electron coupling, even if the self-energy appears to be self-consistent via the Kramers-Kronig relation. Expand
...
1
2
3
...