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High‐Pressure Phase in Tetragonal Two‐Dimensional Polymeric C 60
Author(s) -
Meletov K.P.,
Arvanitidis J.,
Ves S.,
Kourouklis G.A
Publication year - 2001
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200101)223:2<489::aid-pssb489>3.0.co;2-v
Subject(s) - raman spectroscopy , tetragonal crystal system , materials science , phase (matter) , fullerene , amorphous solid , phonon , high pressure , polymerization , ambient pressure , crystallography , chemical physics , polymer , chemistry , condensed matter physics , thermodynamics , composite material , optics , organic chemistry , physics
The pressure behavior of the phonon modes of tetragonal two‐dimensional polymeric C 60 has been studied at pressure up to 27.5 GPa and room temperature by means of Raman spectroscopy. Gradual transformation of the material to a new phase was observed in the pressure region 18.0–22.0 GPa. The Raman spectrum characteristics of the high‐pressure phase provide a strong indication that the fullerene molecular cage is retained and the material may be related to a three‐dimensionally polymerized C 60 . The new phase remains stable upon pressure decrease down to 9 GPa. Further release of pressure leads to its transformation to a highly disordered structure whose broad features in the Raman spectrum resemble those of amorphous carbon.