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Pressure-induced transformations in two-dimensional polymeric phases of C60
Meletov K.P.1,2, Arvanitidis J.1, Assimopoulos S.1, Kourouklis G.A.1
1Physics Division, School of Technology, Aristotle University of Thessaloniki, GR-540 06 Thessaloniki, Greece
2Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Russia
Email: mele@issp.ac.ru
Выставление онлайн: 19 марта 2002 г.

The structural stability of the tetragonal and rhombohedral two-dimensional (2D) polimeric phases of C60 has been studied under pressure up to 27 GPa and room temperature by means of in-situ Raman scattering spectroscopy. The results show that the tetragonal 2D phase undergoes an irreversible transformation in the region of 20 GPa while no pressure-induced transitions were observed for the rhombohedral 2D phase. The obtained data are discussed within the framework of recent numerical calculations, which predict the pressure-induced transformation of the 2D polymeric phases of C60 into three-dimensional (3D) polymers in the pressure range 14--20 GPa. This work was supported, in part, by the Russian Foundation for Fundamental Research (grant N 99-02-17555). The support by the General Secretariat for Research and Technology (GSRT), Greece (grant N ПENEDelta 99, 99EDelta/62) is acnowledged.
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