MAGNETISM AND PAIRING IN A C60 MOLECULE - A VARIATIONAL MONTE-CARLO STUDY

The ground-state properties of electrons in the C60 geometry is studie d based on the t-J-like Hamiltonian. By using a variational Monte Carl o method, it is found that the Gutzwiller projected Fermi-sea state an d the pure RVB state have the lowest variational energies in the undop ed case as compared to other spin singlet states. For a doped C60 mole cule, the electron pairing and itinerant ferromagnetism are discussed. A comparison with related works is also presented.