Pressure-induced phase in tetragonal two-dimensional polymeric C60

K. P. Meletov, J. Arvanitidis, E. Tsilika, S. Assimopoulos, G. A. Kourouklis, S. Ves, A. Soldatov, K. Prassides

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30 Citations (Scopus)

Abstract

The behavior of the phonon modes of the tetragonal phase of the two-dimensional polymerized C60 has been studied as a function of pressure, up to 27.5 GPa, at room temperature by means of Raman spectroscopy. Gradual transformation of the material to a new phase was observed in the pressure region 19.0-21.0 GPa. As a result of this phase transformation dramatic changes in the Raman spectrum have been recorded. Namely, the total number of bands was reduced and a number of very strong peaks appeared. The Raman spectrum characteristics provide strong indication that the fullerene molecular cage is retained and therefore the high-pressure phase may be related to a three-dimensionally polymerized C60 phase. The high-pressure phase remains stable upon pressure decrease from 27.5 down to 9 GPa. Further release of pressure leads to the destruction of this high-pressure phase to a highly disordered structure whose broad features in the Raman spectrum resemble those of amorphous carbon.

Original languageEnglish
Article number054106
Pages (from-to)541061-541064
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume63
Issue number5
Publication statusPublished - 2001 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Meletov, K. P., Arvanitidis, J., Tsilika, E., Assimopoulos, S., Kourouklis, G. A., Ves, S., Soldatov, A., & Prassides, K. (2001). Pressure-induced phase in tetragonal two-dimensional polymeric C60. Physical Review B - Condensed Matter and Materials Physics, 63(5), 541061-541064. [054106].