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Temperature dependence of infrared and Raman modes in polymeric RbC60

Sundar, CS and Gupta, R and Premila, M and Bharathi, A and Hariharan, Y and Sood, AK (2002) Temperature dependence of infrared and Raman modes in polymeric RbC60. In: Journal of Physics and Chemistry of Solids, 63 (9). pp. 1639-1646.

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Official URL: http://dx.doi.org/10.1016/S0022-3697(01)00248-7


Temperature dependence of the intra-molecular vibrational modes Of C-60 in the quasi-1D polymeric RbC60, across the low temperature transition at similar to50 K, has been probed through infrared (IR) and Raman spectroscopies. With the lowering of temperature, the split IR modes of RbC60 are seen to harden but below 50 K a small but definitive signature of an anomalous softening is observed. In addition, the background IR transmission shows an increase below 50 K with the opening of a well defined gap in the electronic spectrum. The implications of these results, along with those of Raman measurements, are discussed in terms of the interaction of intra-molecular phonons with electrons and spin excitations in the system. (C) 2002 Published by Elsevier Science Ltd.

Item Type: Journal Article
Publication: Journal of Physics and Chemistry of Solids
Publisher: Elsevier Science
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: A.Fullerenes;C.Infrared spectroscopy;C.Raman spectroscopy;D. Phonons
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 27 Jul 2011 04:55
Last Modified: 27 Jul 2011 04:55
URI: http://eprints.iisc.ac.in/id/eprint/39455

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