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- W2068756001 abstract "Recent studies carried out on an organic superconductor, ß-(BEDT-TTF)2I3, have shown the important role played by the 13C isotope on the Tc transition, when substitution is made on the central CC bond of the molecule. Simultaneously, Raman studies determined the frequency shifts observed in the CC stretching vibrations in the substituted samples and consequently, put in evidence the role of the intramolecular Ag vibrations. We have extended these studies to compounds of the new carbon family, the fullerenes, in which 82% of the carbon atoms were substituted with 13C in C60. The superconducting transition measured on the same sample doped with potassium is lowered by 1.5 to 2K as compared to the standard material doped in similar conditions. In the Raman spectrum, the main Ag band measured at 1467 cm−1 in 12C60 is shifted to 1420 cm−1 in enriched 13C60. Taking into account the ratio between the molecular weight of the enriched 13C60 and of the standard material, one predicts a theoretical value for this mode at 1418 cm−1 in the enriched sample. A preliminary analysis of the Raman spectrum will be presented." @default.
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- W2068756001 date "1993-04-01" @default.
- W2068756001 modified "2023-10-12" @default.
- W2068756001 title "Isotope effects in the Raman spectra of 13C enriched C60" @default.
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- W2068756001 doi "https://doi.org/10.1016/0379-6779(93)90077-a" @default.
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