We give a quantitative estimate of the screened on-site Coulomb repulsion U in carbon nanotubes and graphite. This is obtained by measuring the Auger spectrum of these materials and performing a theoretical study based on the Green's function method proposed by Cini[Solid. St. Comm. 24, 681 (1977)]. The experimental lineshape is very well reproduced by the theory, where only one fit parameter is employed. This allows to extract the value of the screened on-site repulsion between 2p states, which results U = 4.6 eV for nanotubes and U = 2.1 eV for graphite.
Perfetto, E., Cini, M., Ugenti, S., Castrucci, P., Scarselli, M.a., DE CRESCENZI, M., et al. (2008). Experimental and theoretical study of electronic correlations in carbon nanotubes and graphite from Auger spectroscopy. JOURNAL OF PHYSICS. CONFERENCE SERIES, 100(5), 052082 [10.1088/1742-6596/100/5/052082].
Experimental and theoretical study of electronic correlations in carbon nanotubes and graphite from Auger spectroscopy
Perfetto,E;CINI, MICHELE;CASTRUCCI, PAOLA;SCARSELLI, MANUELA ANGELA;DE CRESCENZI, MAURIZIO;
2008-01-01
Abstract
We give a quantitative estimate of the screened on-site Coulomb repulsion U in carbon nanotubes and graphite. This is obtained by measuring the Auger spectrum of these materials and performing a theoretical study based on the Green's function method proposed by Cini[Solid. St. Comm. 24, 681 (1977)]. The experimental lineshape is very well reproduced by the theory, where only one fit parameter is employed. This allows to extract the value of the screened on-site repulsion between 2p states, which results U = 4.6 eV for nanotubes and U = 2.1 eV for graphite.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
