Slow-charge-carrier electronic transport in the heavy-fermion complex intermetallic

We present an analytical model of the temperature-dependent electrical resistivity ρ ( T ) and the thermoelectric power S ( T ) of heavy-fermion systems that reproduce the maximum in ρ ( T ) and the minimum in S ( T ) . The model is based on the quantum transport theory of slow charge carriers, where the velocity of heavy electrons is low due to their large effective mass m ∗ . The theory is applied to the experimental ρ ( T ) and S ( T ) data of the recently discovered heavy-fermion system YbCu 4.25 , belonging to the class of giant-unit-cell complex metallic alloys.