# Kadowaki-Woods Ratio of Strongly Coupled Fermi Liquids

## TL;DR

This paper evaluates the Kadowaki-Woods ratio in strongly coupled Fermi liquids using first-principles calculations, revealing differences between $d$ and $f$ electron systems linked to Fermi surface characteristics.

## Contribution

It provides a first-principles analysis of the Kadowaki-Woods ratio, highlighting the impact of Fermi surface properties on quasiparticle transport in different electron systems.

## Key findings

- $d$ electron systems have smaller ratios than $f$ systems.
- Fermi surface differences influence quasiparticle relaxation.
- Comparison of Pd and USn$_3$ illustrates Fermi surface dependence.

## Abstract

On the basis of the Fermi liquid theory, the Kadowaki-Woods ratio $A/\gamma^2$ is evaluated by using a first principle band calculation for typical itinerant $d$ and $f$ electron systems. It is found as observed that the ratio for the $d$ electron systems is significantly smaller than the normal $f$ systems, even without considering their relatively weak correlation. The difference in the ratio value comes from different characters of the Fermi surfaces. By comparing Pd and USn$_3$ as typical cases, we discuss the importance of the Fermi surface dependence of the quasiparticle transport relaxation.