Non-Fermi liquid behavior of the electrical resistivity at the ferromagnetic quantum critical point

TL;DR

This paper presents a model explaining non-Fermi liquid behavior near a ferromagnetic quantum critical point, highlighting how magnetic impurities influence electrical resistivity and specific heat, aligning well with experimental data.

Contribution

The study introduces a self-consistent Renormalization-Group model capturing non-Fermi liquid behavior near ferromagnetic quantum criticality, matching experimental observations.

Findings

Resistivity follows a T^{5/3} dependence.

Specific heat exhibits a T ln T dependence.

Model aligns with experimental data for Ni_x Pd_{1-x} alloys.

Abstract

We propose a model for the non-Fermi behavior in the proximity of the quantum phase transition induced by the strong polarization of the electrons due to local magnetic moments. The self - consistent Renormalization - Group methods have been used to calculate the temperature dependence of the electrical resistivity and specific heat. The T^{5/3} dependence of resistivity and the T ln T dependence of the specific heat show that the magnetic impurities drive a ferromagnetic quantum phase transition and near the critical point the system present a non-Fermi liquid behavior. The model is in good agreement with the experimental data obtained for Ni_x Pd_{1-x} alloy.