Theory for effects of pressure on heavy-fermion alloys

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.

8 figures

Cited by in corpus (4)

• The effective increase in atomic scale disorder by doping and superconductivity in Ca${}_3$Rh${}_4$Sn${}_{13}$
• Lifshitz transition in Kondo alloys
• Quantum criticality and superconducting pairing in Ce(1-x)Yb(x)CoIn5 alloys
• Pressure studies of the quantum critical alloy Ce(0.93)Yb(0.07)CoIn5