Low-Temperature Specific Heat of Ce ${Cu}_{2}$ ${Si}_{2}$ and Ce ${Al}_{3}$ : Coherence Effects in Kondo Lattice Systems

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28 May 1984

journal article
research article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 52 (22) , 1982-1985
https://doi.org/10.1103/physrevlett.52.1982

Abstract

Measurements of the specific heat as a function of temperature at varying magnetic fields for the Kondo lattice systems Ce

{Cu}_{2}

{Si}_{2}

and Ce

{Al}_{3}

reveal that, on an energy scale

\sim 0.5 K ≪ T_{K}

, there is structure which is due to the periodicity and is qualitatively changed by disorder in the alloys

{Ce}_{0.9}

Y_{0.1}

{Cu}_{2}

{Si}_{2}

,

{Ce}_{0.8}

Y_{0.2}

{Cu}_{2}

{Si}_{2}

, and

{Ce}_{0.8}

{La}_{0.2}

{Cu}_{2}

{Si}_{2}

. The results support the Fermi-liquid theory of Kondo lattices.

Keywords

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