Volume 74, Number 6, June 2006
|Page(s)||1053 - 1059|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||12 May 2006|
Kondo lattice without Nozières exhaustion effect
Ben-Gurion University of the Negev - Beer-Sheva 84105, Israel
2 Institute for Theoretical Physics, University of Würzburg D-97074 Würzburg, Germany
Accepted: 13 April 2006
We discuss the properties of layered Anderson/Kondo lattices with metallic electrons confined in 2D xy planes and local spins in insulating layers forming chains in the z direction. Each spin in this model possesses its own 2D Kondo cloud, so that the Nozières' exhaustion problem does not occur. The high-temperature perturbational description is matched to exact low-T Bethe-ansatz solution. The excitation spectrum of the model is gapless both in charge and spin sectors. The disordered phases and possible experimental realizations of the model are briefly discussed.
PACS: 71.27.+a – Strongly correlated electron systems; heavy fermions / 75.10.Pq – Spin chain models / 75.30.Mb – Valence fluctuation, Kondo lattice, and heavy-fermion phenomena
© EDP Sciences, 2006
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