Anisotropy and interplane interactions in the dielectric response of graphite
|Title||Anisotropy and interplane interactions in the dielectric response of graphite|
|Publication Type||Palaiseau Article|
|Author Address|| |
Marinopoulos, AG (Reprint Author), Ecole Polytech, Solides Irradies Lab, CEA, CNRS,UMR 7642, F-91128 Palaiseau, France. Ecole Polytech, Solides Irradies Lab, CEA, CNRS,UMR 7642, F-91128 Palaiseau, France. Univ Pais Vasco, Fac Quim, Dept Fis Mat, Ctr Mixto CSIC UPV EHU, San Sebastian 20018, Spain. Donostia Int Phys Ctr, San Sebastian 20018, Spain. Inst Festkorper & Werkstofforsch, D-01171 Dresden, Germany. Univ Vienna, Inst Mat Phys, A-01090 Vienna, Austria.
|Marinopoulos, A-G, Reining, L, Olevano, V, Rubio, A, Pichler, T, Liu, X, Knupfer, M, Fink, J|
|Year of Publication||2002|
|Journal||Phys. Rev. Lett.|
We determined the anisotropic dielectric response of graphite by means of time-dependent density-functional theory and high-resolution valence electron energy-loss spectroscopy. The calculated loss function was in very good agreement with the experiment for a wide range of momentum-transfer orientations with respect to the graphitic basal planes, provided that local-field effects were included in the response. The calculations also showed strong effects of the interlayer Coulomb interaction on the total pi+sigma plasmon. This finding must be taken into account for the explanation of recent loss spectra of carbon nanotube materials.