Electronic structure and electron-phonon coupling of doped graphene layers in KC8
- Author(s)
- Alexander Grüneis, Claudio Attaccalite, Angel Rubio, D.V. Vyalikh, S.L. Molodtsov, J. Fink, Rolf Follath, W. Eberhardt, Bernd Büchner, Thomas Pichler
- Abstract
We propose graphite intercalation compounds (GICs) as a material system with precisely the same electronic properties as doped few layer graphene. Despite the fact that GICs have been around for the last four decades, this fact has gone unnoticed so far. Especially, we focus on the electronic energy bands of KC8 which correspond to a doped graphene monolayer. We provide extensive theoretical and experimental evidence for this claim employing a combined angle-resolved photoemission and theory approach using tight-binding, standard density-functional theory and including electron-electron correlation on a GW level. We observe a strong momentum-dependent kink in the quasiparticle dispersion at 166 meV highlighting electron-phonon coupling to an in-plane transversal optical phonon. These results are key for understanding both the unique electronic properties of doped graphene layers and superconductivity in KC8 .
- Organisation(s)
- Electronic Properties of Materials
- External organisation(s)
- Institute for Electronics, Microelectronics, and Nanotechnology (CNRS UMR 8520), European Theoretical Spectroscopy Facility (ETSF), Technische Universität Dresden, Helmholtz-Zentrum Berlin für Materialien und Energie, Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden
- Journal
- Physical Review B
- Volume
- 79
- ISSN
- 1098-0121
- DOI
- https://doi.org/10.1103/PhysRevB.79.205106
- Publication date
- 2009
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103015 Condensed matter
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/electronic-structure-and-electronphonon-coupling-of-doped-graphene-layers-in-kc8(4d7b8108-3b64-4812-8917-c5a73819ae1f).html