Electronic correlations in graphite and carbon nanotubes from Auger spectroscopy

Autor:	Perfetto, E., Cini, M., Ugenti, S., Castrucci, P., Scarselli, M., De Crescenzi, M., Rosei, F., Khakani, M. A. El
Rok vydání:	2007
Předmět:	Condensed Matter - Strongly Correlated Electrons Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.76.233408
Popis:	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 $2p$ 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. Comment: 5 pages, 3 figures, to appear in Phys. Rev. B
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0710.3721 Zobrazit plný text záznamu View this record from Arxiv