Negative magnetoresistance ofCe3Bi4Pt3at low temperatures

We have calculated the field dependence of the magnetoresistance and the Hall constant for the N=2 insulating phase of the Anderson lattice Hamiltonian using a slave-boson approach. At low temperatures, the magnetoresistance is negative and its field dependence as well as that of the Hall coefficient are in qualitative agreement with the experimental results for ${\mathrm{Ce}}_3$ ${\mathrm{Bi}}_4$ ${\mathrm{Pt}}_3$. At high temperatures, the magnetoresistance has a small positive quadratic field dependence. We predict an almost identical value of the transverse and longitudinal magnetoresistances for this compound at low temperatures.