Exact solution of a Kondo lattice model

TL;DR

This paper introduces an exactly solvable Kondo lattice model describing a strongly correlated electron system interacting with a spin lattice, analyzing its phase diagram, excitations, and quantum critical points.

Contribution

It presents an integrable Kondo lattice model with exact phase boundary determination and analysis of critical behavior, advancing understanding of strongly correlated electron systems.

Findings

Multiple phases identified with varying parameters

Exact phase boundaries determined

Quantum critical behavior analyzed

Abstract

An integrable Kondo lattice model, which describes a strongly correlated electron host interacting with a spin-1/2 lattice, is proposed. It is found that with the variations of the Kondo coupling J, the hole concentration n_h and the magnetic field H, the system may fall into a variety of phases. The phase boundaries of the ground state are determined exactly. The marginal excitations and the quantum critical behavior at the phase boundaries are discussed.