Kondo Lattice without Nozieres Exhaustion Effect

TL;DR

This paper explores a layered Kondo lattice model where each local spin forms its own Kondo cloud, avoiding the Nozieres exhaustion problem, and analyzes its gapless excitation spectrum and potential experimental realizations.

Contribution

It introduces a layered Anderson/Kondo lattice model with independent Kondo clouds, circumventing the Nozieres exhaustion issue and analyzing its unique gapless spectrum.

Findings

Each spin has its own 2D Kondo cloud.

The excitation spectrum is gapless in charge and spin sectors.

Disordered phases and experimental realizations are discussed.

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 z direction. Each spin in this model possesses its own 2D Kondo cloud, so that the Nozieres' exhaustion problem does not occur. 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.