Issue 6, 2011

Raman spectroscopic study of the rare-earth fullerides Eu6−xSrxC60

Abstract

We present Raman spectroscopic studies of the isostructural and isoelectronic Eu6−xSrxC60 (x = 0, 3, 5, 6) and Ba6C60 compounds. The Raman spectra of the Eu-based fullerides show dramatic changes compared to the pure alkaline-earth systems, including significant broadening, splitting and frequency shifts of the fivefold degenerate Hg intramolecular modes of C60. Moreover, the Ag(2) mode exhibits an even larger downshift and a remarkable broadening. These findings are consistent with distortions of the C60 molecular cages and a considerable electron-phonon coupling strength—strongly enhanced in the Eu containing systems—originating from the strong orbital hybridization between the metal atom and the C60 molecule.

Graphical abstract: Raman spectroscopic study of the rare-earth fullerides Eu6−xSrxC60

Supplementary files

Article information

Article type
Paper
Submitted
29 Nov 2010
Accepted
31 Jan 2011
First published
28 Feb 2011

Nanoscale, 2011,3, 2490-2493

Raman spectroscopic study of the rare-earth fullerides Eu6−xSrxC60

J. Arvanitidis, D. Christofilos, G. A. Kourouklis, A. Paloumpi, K. Papagelis, S. Ves, Y. Iwasa and K. Prassides, Nanoscale, 2011, 3, 2490 DOI: 10.1039/C0NR00921K

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