Abstract
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 electron-type heavy-fermion systems and hole-type heavy-fermion systems. The density of states of f electrons is calculated over the whole range of doping concentration under applied pressure. The Kondo temperature, the specific-heat coefficient, and the electrical resistivity are obtained, in agreement with the experiments qualitatively. The contrasting pressure-dependent effects for two types of heavy-fermion alloys are discussed to reveal the coherence in the system under pressure.
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