Anomalous Raman shift in the ternary fullerides with t1g states

X. H. Chen, T. Takenobu, T. Muro, H. Fudo, Y. Iwasa

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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 languageEnglish
Pages (from-to)12462-12466
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume60
Issue number17
Publication statusPublished - 1999
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Chen, X. H., Takenobu, T., Muro, T., Fudo, H., & Iwasa, Y. (1999). Anomalous Raman shift in the ternary fullerides with t1g states. Physical Review B - Condensed Matter and Materials Physics, 60(17), 12462-12466.