Abstract
Raman spectra have been studied on two kinds of highly doped fullerides of AxBa3C60 (x=0,3;A=K, Rb) and KxSm2.75C60 (x=0,3.25). It was found that the Raman spectra are essentially identical to each other for all ternary fullerides. The results show a crossover point at the boundary of t1u and t1g bands for the charge-transfer dependence of Raman shift. Particularly, the totally symmetric Ag(2) mode in t1g fullerides cannot be understood by a simple extrapolation from the low-doped t1u fullerides, where the Ag(2) mode follows a characteristic shift of ∼6.3 cm-1 per elementary charge. The present result shows that the Raman spectra of t1g states cannot be explained only by charge transfer.
Original language | English |
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Pages (from-to) | 12462-12466 |
Number of pages | 5 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 60 |
Issue number | 17 |
Publication status | Published - 1999 |
Externally published | Yes |
ASJC Scopus subject areas
- Condensed Matter Physics