Electron scattering near an itinerant to localized electronic transition

TL;DR

This paper investigates the unusual T^(3/2) resistivity behavior in strongly correlated systems near an electronic transition, proposing a new scattering model involving bond-length fluctuations to explain the observations.

Contribution

It introduces a novel scattering mechanism involving bond-length fluctuations to explain unconventional resistivity behavior near an electronic transition.

Findings

Resistivity proportional to T^(3/2) in multiple materials

Existing theories cannot explain the observed temperature dependence

Proposed model accounts for experimental data through electron-bond fluctuation scattering

Abstract

We report an unconventional temperature dependence of the resistivity in several strongly correlated systems approaching a localized to itinerant electronic transition from the itinerant electron side. The observed resistivity, proportioanl to T^(3/2)over the entire range of materials discussed, cannot be explained within the framework of existing theories. We propose a model in which the scattering of the conduction electrons by locally cooperative bond-length fluctuations in a matrix of vibronic and Fermi-liquid electrons can account for the experimental data.