Physical Review B - Condensed Matter and Materials Physics
Citation:
Volume 68, Issue 15, Page 1534021-1534024
Abstract:
In situ high pressure x-ray diffraction experiments revealed that a transformation from the twodimensional
(2D) tetragonal C60 polymer to a three-dimensional (3D) polymer takes place via a highly
anisotropic deformation of C60 molecules along the c axis, as an irreversible first-order transformation
above 20 GPa. In the 3D polymer phase, the 2+2 bonds remain in the 2D plane, while neighboring layers are
connected by the 3+3 bonds. The bulk modulus of the 3D polymer was 407 GPa, being slightly smaller than
that of diamond.
