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Reversible Pressure-Induced Amorphization in Solid C,O: Raman and Photoluminescence Study

Chandrabhas, N and Sood, AK and Muthu, DVS and Sundar, CS and Bharathi, A and Hariharan, Y and Rao, CNR (1994) Reversible Pressure-Induced Amorphization in Solid C,O: Raman and Photoluminescence Study. In: Physical Review Letters, 73 (25). pp. 3411-3414.


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We have studied single crystals of C70 by Raman scattering and photoluminescence in the pressure range from 0 to 3 1.1 GPa. The Raman spectrum at 3 1.1 GPa shows only a broadband similar to that of the amorphous carbon without any trace of the Raman lines of CT0. After releasing the pressure from 3 1.1 GPa, the Raman and the photoluminescence spectra of the recovered sample are that of the starting C70 crystal. These results indicate that the C70 molecules are stable up to 3 1.1 GPa and the amorphous carbon high pressure phase is reversible, in sharp contrast to the results on solid Cm. A qualitative explanation is suggested in terms of intermolecular versus intramolecular interactions.

Item Type: Journal Article
Publication: Physical Review Letters
Publisher: American Physical Society (APS)
Additional Information: Copyright for this article belongs to American Physical Society (APS)
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 01 Sep 2004
Last Modified: 19 Sep 2010 04:13
URI: http://eprints.iisc.ac.in/id/eprint/1013

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