Dynamics and transport properties of heavy fermions: theory

Details Dynamics and transport properties of heavy fermions: theory Dynamics and transport properties of heavy fermions: theory

2005-05-06

arxiv.org/abs/cond-mat/0505148v1

J.Phys.: Condens. Matter Vol.17 (2005) 2935-2958

Physics

Condensed Matter

Strongly Correlated Electrons

27 pages, 12 figures

Scientific paper

10.1088/0953-8984/17/19/009

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 w/w_L,T/w_L scaling in terms of a single underlying low-energy coherence scale w_L. Dynamics/transport on all relevant (w,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.

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