Direct observation of the vanishing electron energy loss spectroscopy cross section in graphene
- Author(s)
- Alberto Guandalini, Ryosuke Senga, Yung Chang Lin, Kazu Suenaga, Paolo Barone, Francesco Mauri, Thomas Pichler, Christian Kramberger
- Abstract
In transmission electron energy loss (EEL) spectroscopy, the cross section in two dimensions (2D) is quenched by kinematic effects once the momentum transfer becomes smaller than a critical value set by qz, the momentum loss parallel to the beam. Our highly momentum (Δq=0.02Å-1) and energy (ΔE=45 meV) resolved setup is instrumental in delivering the experimental verification of quenched 2D EEL spectra on freestanding graphene at momentum transfers q below 0.06Å-1. We retrieve the intrinsic uniform dielectric response of graphene from measured spectra by quantifying the kinematic suppression.
- Organisation(s)
- Electronic Properties of Materials
- External organisation(s)
- Sapienza University of Rome, National Institute of Advanced Industrial Science and Technology (AIST), Osaka University, Institute of Genetics and Biophysics "Adriano Buzzati-Traverso", CNR
- Journal
- Physical Review B
- Volume
- 111
- No. of pages
- 6
- ISSN
- 2469-9950
- DOI
- https://doi.org/10.1103/PhysRevB.111.L041401
- Publication date
- 01-2025
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103018 Materials physics, 103009 Solid state physics, 103020 Surface physics
- ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials, Condensed Matter Physics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/a921ed8d-b804-4454-82d8-7f6fcb369b96