Pressure effects on heavy fermion alloys

Abstract

In this Letter, the effects of pressure on heavy fermion alloys are studied in the framework of the Yoshimori–Kasai model under the coherent potential approximation. A unified picture is presented for both the electron-type heavy fermion systems and the hole-type heavy fermion systems. The density of states of f-electrons under the applied pressure and its variation with the alloy concentration are calculated self-consistently. The slave-boson parameter and the Kondo temperature are also obtained. These calculations show the incorporated results of alloying effects and pressure effects, in agreement with the experiments qualitatively.