SPECTROSCOPIC PROPERTIES OF CE3BI4PT3

The spectrum of magnetic and electronic excitations of a theoretical m odel of the heavy fermion semiconducting materials is calculated. The system is modeled by the degenerate Anderson lattice Hamiltonian. The coulomb interaction between two electrons on the same f orbital is tre ated by projecting out the doubly occupied configurations, using the s lave boson technique. In the mean-field approximation, the system show s a transition between a low-temperature insulating phase and a high-t emperature metallic phase. The dynamical susceptibility and optical co nductivities are calculated for this system. The spectra show contribu tions from both quasi-elastic and inter-band excitations. The results are compared with inelastic neutron scattering experiments.