Influence of disorder on the transport properties of heavy-fermion systems

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dc.creatorGrenzebach, Claas
dc.creatorAnders, Frithjof B.
dc.creatorCzycholl, Gerd
dc.creatorPruschke, Thomas
dc.date2007-11-12
dc.date2008-03-25
dc.date.accessioned2026-07-07T09:27:58Z
dc.date.available2026-07-07T09:27:58Z
dc.descriptionThe influence of substitutional disorder on the transport properties of heavy-fermion systems is investigated. We extend the dynamical mean-field theory treatment of the periodic Anderson model (PAM) to a coherent-potential approximation for disordered strongly correlated electron systems. Considering two distinct local environments of a binary alloy $A_c B_{1-c}$ with arbitrary concentration $c$, we explore two types of disorder: on the f site and on the ligand sites. We calculate the spectral functions and self-energies for the disordered PAM as well as the temperature dependence of the resistivity and the thermoelectric power. The characteristic concentration dependence as well as the order of magnitude of transport properties are reproduced for metallic heavy-fermion systems and Kondo insulators. In particular, sign changes of the Seebeck coefficient as function of temperature and concentration are observed.
dc.description17 pages, 22 figures, published version
dc.identifierhttps://arxiv.org/abs/0711.1768
dc.identifierhttp://arxiv.org/abs/0711.1768
dc.identifierPhys. Rev. B 77, 115125 (2008)
dc.identifierdoi:10.1103/PhysRevB.77.115125
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/157295
dc.subjectStrongly Correlated Electrons
dc.titleInfluence of disorder on the transport properties of heavy-fermion systems
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