Kondo lattice without Nozières exhaustion effect

¹ Ben-Gurion University of the Negev - Beer-Sheva 84105, Israel
² Institute for Theoretical Physics, University of Würzburg D-97074 Würzburg, Germany

Received: 17 November 2005
Accepted: 13 April 2006

Abstract

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.