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Raman shift dependence of charge transfer is studied in the two fulleridefamilies of AxBa3C60 (x=0,3; A=K,Rb) and KxSm2.75C60 (x=0,3.25). It is foundthat the Raman spectra are essentially identical to each other for all ternaryfullerides, The results show a crossover point at the boundary of t1u and t1gbands for the Raman shift dependence of charge transfer. For the t1ufullerides, the Ag(2) pinch mode follows the characteristic shift of ~6.3cm-1per elementary charge widely observed in KxC60. The two Ag modes in t1gfullerides show a complicated behavior. An anomalous Raman shift is observed inthe t1g fullerides. This anomalous Raman shift of the two Ag modes could not beexplained only by charge transfer.Comment: 12 pages, 4 figures, submitted to Phys. Rev. B (Feburary 3, 1999

physical review. b, condensed matter

Anomalous Raman shift in the ternary fullerides with<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>t</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mi>g</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>states

Anomalous Raman shift in the ternary fullerides witht1gstates