Are heavy-fermion metals Fermi liquids?

F. Steglich, P. Gegenwart, R. Helfrich, C. Langhammer, P. Hellmann, L. Donnevert, C. Geibel, M. Lang, G. Sparn, W. Assmus, G. R. Stewart, A. Ochiai

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Abstract

We present the results of specific-heat and resistivity measurements as a function of temperature, magnetic field and hydrostatic pressure on the Kondo lattice CeNi2Ge2, the heavy-fermion superconductors CeCu2Si2 and UBe13 as well as the low-carrier-density system Yb4As3. "Non-Fermi-liquid" effects in the low-temperature normal-state properties of the three former systems are consistent with the existence of a "nearby" quantum critical point, presumably of antiferromagnetic type. Yb4As3, though showing the outward appearance of a Landau-type heavy-fermion metal, behaves very differently, i.e. as an extreme two-fluid system.

Original languageEnglish
Pages (from-to)235-242
Number of pages8
JournalZeitschrift fur Physik B-Condensed Matter
Volume103
Issue number2
DOIs
Publication statusPublished - 1996 Jun

ASJC Scopus subject areas

  • Condensed Matter Physics

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    Steglich, F., Gegenwart, P., Helfrich, R., Langhammer, C., Hellmann, P., Donnevert, L., Geibel, C., Lang, M., Sparn, G., Assmus, W., Stewart, G. R., & Ochiai, A. (1996). Are heavy-fermion metals Fermi liquids? Zeitschrift fur Physik B-Condensed Matter, 103(2), 235-242. https://doi.org/10.1007/s002570050366