Author/Authors :
Lorentzen، نويسنده , , J.D. and Guha، نويسنده , , Candi S. and Menéndez، نويسنده , , J. and Giannozzi، نويسنده , , P. and Baroni، نويسنده , , S.، نويسنده ,
Abstract :
The Raman cross section for the pentagonal pinch mode of C60 at 1469 cm−1 has been determined at a laser excitation wavelength λL = 752.5 nm. The experimental value, dσ/dΩ = (2.09 ± 0.29) × 10−29 cm2/sr, is found to be in good agreement with predictions from an ab initio calculation based on density functional perturbation theory. A simple bond polarizability model with parameters obtained from hydrocarbon Raman measurements yields Raman intensities in C60 within one order of magnitude of the experimental data.
