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Observation and Assignment of Silent and Higher Order Vibrations in the Infrared Transmission of C60 Crystals | | Michael C. Martin
; Xiaoqun Du
; John Kwon
; L. Mihaly
; | | Date: |
7 Feb 1994 | | Journal: | Phys. Rev. B 50, 173 (1994) | | Subject: | cond-mat | | Affiliation: | Department of Physics, SUNY at Stony Brook. | | Abstract: | We report the measurement of infrared transmission of large C60 single crystals. The spectra exhibit a very rich structure with over 180 vibrational absorptions visible in the 100 - 4000 cm-1 range. Many silent modes are observed to have become weakly IR-active. We also observe a large number of higher order combination modes. The temperature (77K - 300K) and pressure (0 - 25KBar) dependencies of these modes were measured and are presented. Careful analysis of the IR spectra in conjunction with Raman scattering data showing second order modes and neutron scattering data, allow the selection of the 46 vibrational modes C60. We are able to fit *all* of the first and second order data seen in the present IR spectra and the previously published Raman data (~300 lines total), using these 46 modes and their group theory allowed second order combinations. | | Source: | arXiv, cond-mat/9402033 | | Services: | Forum | Review | PDF | Favorites | |
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