F. Aguileragranja et al., RECURSION METHOD STUDY OF THE ELECTRONIC-STRUCTURE OF SOME FULLERENES, Journal of physics. Condensed matter, 5, 1993, pp. 389-392
The electronic structure of C60, Si60 and Ge60 is calculated by real-s
pace methods, based on a Hubbard-type Hamiltonian which includes s- an
d p-type electrons. The equations of motion for the Green function are
solved by recursion methods. Differences in the electronic structure
of the three elements are discussed.