Electronic correlations in graphite and carbon nanotubes from Auger spectroscopy
Strongly Correlated Electrons
2009-11-13 v1 Mesoscale and Nanoscale Physics
Abstract
We have determined the screened on-site Coulomb repulsion in graphite and single wall carbon nanotubes by measuring their Auger spectra and performing a new theoretical analysis based on an extended Cini-Sawatzky approach where only one fit parameter is employed. The experimental lineshape is very well reproduced by the theory and this allows to determine the value of the screened on-site repulsion between states, which is found to be 2.1 eV in graphite and 4.6 eV in nanotubes. The latter is robust by varying the nanotube radius from 1 to 2 nm.
Keywords
Cite
@article{arxiv.0710.3721,
title = {Electronic correlations in graphite and carbon nanotubes from Auger spectroscopy},
author = {E. Perfetto and M. Cini and S. Ugenti and P. Castrucci and M. Scarselli and M. De Crescenzi and F. Rosei and M. A. El Khakani},
journal= {arXiv preprint arXiv:0710.3721},
year = {2009}
}
Comments
5 pages, 3 figures, to appear in Phys. Rev. B