We have investigated the fragmentation of ${\mathrm{C}}_{60}$,${\mathrm{C}}_{70}$ carbon clusters using molecular-dynamics simulation combined with the empirical-tight-binding total-energy-calculation method. The fragmentation process is studied by considering the heat capacity, binding energy, and the average number of neighboring atoms in terms of temperature and the relation to the formation process is further discussed.

• Received 7 June 1993

DOI:https://doi.org/10.1103/PhysRevB.48.18230