NEGATIVE MAGNETORESISTANCE OF CE3BI4PT3 AT LOW-TEMPERATURES

We have calculated the field dependence of the magnetoresistance and t he Hall constant for the N = 2 insulating phase of the Anderson lattic e Hamiltonian using a slave-boson approach. At low temperatures, the m agnetoresistance is negative and its field dependence as well as that of the Hall coefficient are in qualitative agreement with the experime ntal results for Ce3Bi4Pt3. At high temperatures, the magnetoresistanc e has a small positive quadratic field dependence. We predict an almos t identical value of the transverse and longitudinal magnetoresistance s for this compound at low temperatures.