Pomeranchuk effect in unstable Ytterbium systems

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$YbInCu_{4}$ and its alloys present discontinuous, first order iso-structural transitions at pressure dependent temperatures $T_V(P)$, where a local moment phase coexist with a renormalized Fermi liquid phase. We show that along the coexistence line $T_V(P)$ the entropy of the large volume renormalized Fermi liquid phase is smaller than that of the higher density, local moment phase. This implies the existence of a Pomeranchuk effect in these Kondo lattice materials in analogy with $^3He$. The theoretical possibility of using these systems as cooling machines is discussed.
3 pages, 3 figures and 1 table

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Strongly Correlated Electrons, Materials Science

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http://salesiana.dossiersoluciones.com/handle/123456789/23496

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0403251
 http://arxiv.org/abs/cond-mat/0403251

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arXiv