La substitution induced linear temperature dependence of electrical resistivity and Kondo behavior in the alloys, Ce_{2-x}La_{x}CoSi_{3}

TL;DR

This study investigates how La substitution in Ce_{2-x}La_{x}CoSi_{3} alloys induces linear temperature dependence of resistivity and modifies Kondo behavior, revealing non-Fermi liquid characteristics.

Contribution

It reports new experimental findings on resistivity, heat capacity, and magnetic susceptibility in Ce_{2-x}La_{x}CoSi_{3} alloys, highlighting La substitution effects.

Findings

La substitution induces linear resistivity at low temperatures

Modification of Kondo effect observed in alloys

Ce_{2}CoSi_{3} is mixed valent

Abstract

The results of electrical resistivity, heat capacity and magnetic susceptibility behavior of new class of alloys, Ce_{2-x}La_{x}CoSi_{3}, are reported. The x= 0.0 alloy is mixed valent and La substitution for Ce (x= 0.25) induces linear temperature dependence of resistivity at low temperatures, an observation of relevance to the topic of non-Fermi liquid behavior. The modifications of Kondo effect for all the alloys are also presented.