Plasmon electron-hole resonance in epitaxial graphene.

  title={Plasmon electron-hole resonance in epitaxial graphene.},
  author={Christoph Tegenkamp and Herbert Pfn{\"u}r and Thomas Langer and Jens Baringhaus and Hans Werner Schumacher},
  journal={Journal of physics. Condensed matter : an Institute of Physics journal},
  volume={23 1},
The quasiparticle dynamics of the sheet plasmons in epitaxially grown graphene layers on SiC(0001) has been studied systematically as a function of temperature, intrinsic defects, influence of multilayers and carrier density using electron energy loss spectroscopy with high energy and momentum resolution. The opening of an inter-band decay channel appears as an anomalous kink in the plasmon dispersion which we describe as a resonance effect in the formation of electron-hole pairs. Due to the… CONTINUE READING