Magnetic and Thermodynamic Properties of the Three-Dimensional Periodic Anderson Hamiltonian

TL;DR

This study uses Quantum Monte Carlo to analyze the 3D periodic Anderson model, revealing a sharp crossover to the Kondo singlet regime and its implications for magnetic and thermodynamic properties, with potential relevance to pressure-induced volume changes.

Contribution

It provides new insights into the sharpness of the Kondo crossover and its thermodynamic signatures in the three-dimensional periodic Anderson model.

Findings

Sharp crossover to Kondo singlet regime at low temperatures

Magnetic correlations reflected in thermodynamics and density of states

Potential for large volume changes driven by energy shifts during screening

Abstract

The three dimensional periodic Anderson model is studied with Quantum Monte Carlo. We find that the cross-over to the Kondo singlet regime is remarkably sharp at low temperatures, and that the behavior of magnetic correlations is consistently reflected in both the thermodynamics and the density of states. The abruptness of the transition suggests that energy changes associated with the screening of local moments by conduction electrons might be sufficient to drive large volume changes in systems where applied pressure tunes the ratio of interband hybridization to correlation energy.