Control of the pi plasmon in a single layer graphene by charge doping

Control of the pi plasmon in a single layer graphene by charge doping: S. Y. Shin, N. D. Kim, J. G. Kim, K. S. Kim, D. Y. Noh et al.
We report that the behavior of a low-energy pi plasmon excitation in a single layer graphene (SLG) can be modified by doping external potassium (K) atoms, a feature demanded to realize the graphene plasmonics. Using high-resolution electron-energy-loss spectroscopy, we find that upon K-doping the pi ... [Appl. Phys. Lett. 99, 082110 (2011)] published Thu Aug 25, 2011.