Non conventional screening of the Coulomb interaction in C-60 and in carbon nanotubes
| Autor: | van den Brink, J, Sawatzky, GA, Kuzmany, H, Fink, J, Mehring, M, Roth, S |
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| Jazyk: | angličtina |
| Rok vydání: | 1998 |
| Předmět: | |
| Zdroj: | ELECTRONIC PROPERTIES OF NOVEL MATERIALS-PROGRESS IN MOLECULAR NANOSTRUCTURES, 152-155 STARTPAGE=152;ENDPAGE=155;TITLE=ELECTRONIC PROPERTIES OF NOVEL MATERIALS-PROGRESS IN MOLECULAR NANOSTRUCTURES |
| Popis: | We study the screening of the Coulomb interaction in C-60 and carbon nanotubes. It is shown that for these systems the screening deviates strongly from the Clausius-Mossotti behavior. The short range interaction is strongly screened and the long range interaction is anti-screened, thereby strongly reducing the gradient of the Coulomb interaction. For the nanotubes a cross-over from quasi one dimensional to two dimensional screening is found with increasing radius of the nanotube. The unconventional screening explains the moderate effect of electron-electron correlations on the electronic structure of these molecules. |
| Databáze: | OpenAIRE |
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