Relationship between the thermopower and entropy of strongly correlated electron systems

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dc.creatorZlatic, V.
dc.creatorMonnier, R.
dc.creatorFreericks, J.
dc.creatorBecker, K. W.
dc.date2005-12-13
dc.date2007-01-18
dc.date.accessioned2026-07-07T07:41:22Z
dc.date.available2026-07-07T07:41:22Z
dc.descriptionA number of recent experiments report the low-temperature thermopower $α$ and specific heat coefficients $γ=C_V/T$ of strongly correlated electron systems. Describing the charge and heat transport in a thermoelectric by transport equations, and assuming that the charge current and the heat current densities are proportional to the number density of the charge carriers, we obtain a simple mean-field relationship between $α$ and the entropy density $\cal S$ of the charge carriers. We discuss corrections to this mean-field formula and use results obtained for the periodic Anderson and the Falicov-Kimball models to explain the concentration (chemical pressure) and temperature dependence of $α/γT$ in EuCu$_2$(Ge$_{1-x}$Si$_x$)$_2$, CePt$_{1-x}$Ni$_x$, and YbIn$_{1-x}$Ag${_x}$Cu$_4$ intermetallic compounds. % We also show, using the 'poor man's mapping' which approximates the periodic Anderson lattice by the single impurity Anderson model, that the seemingly complicated behavior of $α(T)$ can be explained in simple terms and that the temperature dependence of $α(T)$ at each doping level is consistent with the magnetic character of 4{\it f} ions.
dc.description11 pages
dc.identifierhttps://arxiv.org/abs/cond-mat/0512288
dc.identifierhttp://arxiv.org/abs/cond-mat/0512288
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122084
dc.subjectStrongly Correlated Electrons
dc.titleRelationship between the thermopower and entropy of strongly correlated electron systems
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