Regensburg 2007 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 20: Correlated Electrons - Poster Session

TT 20.17: Poster

Mittwoch, 28. März 2007, 14:00–17:45, Poster A

Strong inhomogeneities and non-Fermi liquids in randomly depleted Kondo lattices — •Matthias Vojta¹ and Ribhu Kaul² — ¹Institut für Theoretische Physik, Universität Köln — ²Physics Department, Harvard University

We discuss the low-temperature behavior of Kondo lattices upon random depletion of the local f moments. For a large range of intermediate doping levels, between the coherent Fermi liquid of the dense lattice and the single-impurity Fermi liquid of the dilute limit, we find strongly inhomogeneous states that exhibit distinct non-Fermi liquid characteristics. In particular, the interplay of dopant disorder and strong interactions leads to rare weakly screened moments which dominate the bulk susceptibility. Our results are relevant to compounds like (Ce,La)CoIn₅.