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Dynamics and transport properties of heavy fermions: theory

David E Logan·N S Vidhyadhiraja
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Abstract

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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David E Logan, N S Vidhyadhiraja. 2005-05-06. Dynamics and transport properties of heavy fermions: theory. https://doi.org/10.1088/0953-8984%2F17%2F19%2F009

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