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Photo‐Induced Structural Transformation of C 60 Single Crystals under High Pressure
Author(s) -
Mitani T.,
Matsuishi K.,
Onari S.
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<495::aid-pssb495>3.0.co;2-6
Subject(s) - raman spectroscopy , materials science , photoluminescence , irradiation , ambient pressure , raman scattering , high pressure , phase (matter) , intermolecular force , redshift , fullerene , analytical chemistry (journal) , optics , molecular physics , chemistry , optoelectronics , organic chemistry , thermodynamics , molecule , physics , quantum mechanics , galaxy , nuclear physics
The effects of photo‐irradiation onto C 60 single crystals under high pressure to 27 GPa were investigated by photoluminescence and Raman scattering measurements. While the PL band, which was observed originally at 1.68 eV at ambient pressure, returned to the initial position reversibly after releasing pressure without photo‐irradiation, the PL band with photo‐irradiation under pressure did not return to the initial position and its redshift depended on the applied pressure (∼—12 meV /GPa). In Raman spectra, a new mode appeared at about 10 cm —1 lower than the A g (2) mode at ambient pressure as a result of the formation of a polymeric phase after photo‐irradiation under high pressure. The frequency of the new mode also depended on the applied pressure. The observations suggest that a new fullerene network is formed by large‐scale, strong intermolecular bonds that differ from the [2 + 2] cycloadditional ring structure.