Condensed Matter Physics, 1997, No 9, p. 47-56,
English
DOI:10.5488/CMP.9.47
Title: EFFECT OF PRESSURE ON THE STRUCTURE AND INTERMOLECULAR
PHONONS IN SOLID C_{60}
Authors: Yu.I.Prilutskii, V.A.Andreev, G.G.Shapovalov (Kiev
Shevchenko University, Department of Physics, 64 Volodymyrska St.,
UA-252017 Kiev, Ukraine)
The low-temperature orientationaly ordered crystalline phase of fullerene
C_60 was investigated in dependence on the external pressure. The
vibrational spectrum of C_60 crystal was calculated using the group theory
and atom-atom potentials methods. The frequencies of intermolecular modes as
the functions of external pressure were studied. An assumption was made that
the energy of the lattice includes two contributions: a Lennard-Jones (12-6)
potential and electrostatic interaction of charges located on the single and
double bonds of C_60 molecule. The results obtained are in good agreement
with the available experimental data.
Comments: Figs. 4, Refs. 44, Tabs. 1.