Dynamics and transport properties of heavy fermions: theory

The paramagnetic phase of heavy fermion systems is investigated, using a non-perturbative local moment approach to the asymmetric periodic Anderson model within the framework of dynamical mean-field theory. The natural focus is on the strong coupling Kondo lattice regime wherein single-particle spectra, scattering rates, dc transport and optics are found to exhibit (omega/omega(L), T/omega(L)) scaling in terms of a single underlying low-energy coherence scale omega(L). Dynamics/transport on all relevant (omega, T) scales are encompassed, from the low-energy behaviour characteristic of the lattice coherent Fermi liquid,through incoherent effective single-impurity physics likewise found to arise in the universal scaling regime, to non-universal high-energy scales; and which description in turn enables viable quantitative comparison to experiment.