Pressure Induced Transitions in Heavy-Fermion Systems
Sun Zhang a and Yi-Qiao Dong b
aJoint Center for Particle, Nuclear Physics and Cosmology (J-CPNPC), PMO-NJU, Nanjing 210008, China
bKey Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
Received: February 13, 2015; In final form: July 20, 2015
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In this paper, the electron-type heavy-fermion system and the hole-type heavy-fermion system are classified by means of the cell-volume difference between two typical valence states of f ions. Two kinds of transitions induced by pressure are studied theoretically within a unified picture presented for both two types of heavy-fermion systems. Among these transitions, the incoherence-to-coherence transition in the electron-type heavy-fermion system is confirmed intensively in experiments, while the coherence-to-incoherence transition in the hole-type heavy-fermion system is discussed as a prediction for further observations.

DOI: 10.12693/APhysPolA.128.389
PACS numbers: 75.30.Mb, 75.20.Hr, 71.28.+d, 74.62.Fj