[en] The inelastic electron tunneling spectrum (IETS) of highly oriented pyrolitic graphite has been measured with scanning tunneling spectroscopy (STS) at 6 K. The observed spectral features are in very good agreement with the vibrational density of states of graphite calculated from first principles. We discuss the enhancement of certain phonon modes by phonon-assisted tunneling in STS based on the restrictions imposed by the electronic structure of graphite. We also demonstrate the local excitation of surface plasmons in IETS, which are detected at an energy of 40 meV.
Disciplines :
Physique
Auteur, co-auteur :
Vitali, L.; Max-Planck-Institut für Festkörperforschung
Schneider, M. A.; Max-Planck-Institut für Festkörperforschung
Kern, K.; Max-Planck-Institut für Festkörperforschung
WIRTZ, Ludger ; Department of Material Physics, University of the Basque Country, Centro Mixto CSIC-UPV, and Donostia International Physics Center
Rubio, A.; Department of Material Physics, University of the Basque Country, Centro Mixto CSIC-UPV, and Donostia International Physics Center
Langue du document :
Anglais
Titre :
Phonon and plasmon excitation in inelastic electron tunneling spectroscopy of graphite
