The influence of spin and charge fluctuations on the pressure dependence of the Neel temperature near a quantum phase transition in rare-earth intermetallic compounds

TL;DR

This paper investigates how spin and charge fluctuations affect the pressure dependence of the Neel temperature in heavy fermion intermetallic compounds near a quantum phase transition, using the periodic Anderson model.

Contribution

It introduces a one-loop approximation analysis of the periodic Anderson model to quantitatively describe experimental pressure effects on the Neel temperature.

Findings

Fluctuation corrections are crucial for accurate modeling.

The approach successfully matches experimental data for CeRhIn₅.

Highlights the role of spin and charge fluctuations near quantum criticality.

Abstract

In the one-loop approximation for the periodic Anderson model the contributions of spin and charge fluctuations to the renormalization of the antiferromagnetic order parameter are calculated. It is shown that taking into account the fluctuation corrections allows to quantitatively describe the pressure dependence of the Neel temperature observed in quasi-two-dimensional intermetallic antiferromagnet with heavy fermions CeRhIn$_5$.