Are heavy-fermion metals Fermi liquids?

Autor: P. Hellmann, G. Sparn, G. R. Stewart, Philipp Gegenwart, C. Langhammer, Wolf Assmus, Christoph Geibel, R. Helfrich, Michael Lang, Akira Ochiai, Frank Steglich, L. Donnevert
Rok vydání: 1996
Předmět:
Zdroj: Zeitschrift für Physik B Condensed Matter. 103:235-242
ISSN: 1431-584X
0722-3277
DOI: 10.1007/s002570050366
Popis: 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 normalstate 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.
Databáze: OpenAIRE
Externí odkaz: