MAGNETOTRANSPORT IN HEAVY FERMION COMPOUNDS

An account is given of transport coefficients of heavy fermion systems in magnetic field as calculated by perturbation theory with respect to hybridization, i.e, the LNCA-technique, applied to a Kondo-lattice model. After a short discussion of the underlying approximations, including the use of a proper relaxation time and its calculation via local self-energy, and of the reliability of the LNCA in magnetic field, numerical results for the Hall constant, magnetoresistivity and thermopower as functions of temperature and field are presented. The discussion concentrates on the coherent Fermi-liquid regime at low temperature and field and concludes with a short comparison to a semiphenomenological treatment within Fermi-liquid theory.