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Theory for effects of pressure on heavy-fermion alloys

Sun Zhang
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Abstract

The effects of pressure on heavy-fermion alloys are studied in the framework of 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 is calculated over the whole range of the doping concentration under the 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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Sun Zhang. 2002-06-30. Theory for effects of pressure on heavy-fermion alloys. https://doi.org/10.1103/physrevb.65.064407

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