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Non-Fermi-Liquid Properties and Exotic Superconductivity in CeCu2Si2 and (UTh)Be13

  • M. Lang
  • P. Gegenwart
  • R. Helfrich
  • M. Köppen
  • F. Kromer
  • C. Langhammer
  • C. Geibel
  • F. Steglich
  • J. S. Kim
  • G. R. Stewart

Abstract

Tetragonal CeCu2Si2 [1] and cubic UBe13 [2] belong to the class of strongly correlated (electron materials where a periodic lattice of partially filled f shells is embedded in a metallic environment. Below a characteristic “Kondo temperature” Tk, typically of the order of 10K, quasiparticles composed of both local f degrees of freedom and itinerant conduction-electron degrees of freedom form. As has been inferred from the giant Sommerfeld coefficient r of about 1 J/K2mole, the huge effective quasiparticle masses m· (100–1000 mel) are governed by the f degrees of freedom. The discontinuity of the specific heat at Tc which was found to scale with the large γ [1, 2] proved that superconductivity is, indeed, formed by those heavy fermions (HF).

Keywords

Heavy Fermion Quantum Critical Point Landau Fermi Liquid Heavy Fermion Superconductivity Relative Length Change 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1999

Authors and Affiliations

  • M. Lang
    • 1
  • P. Gegenwart
    • 1
  • R. Helfrich
    • 1
  • M. Köppen
    • 2
  • F. Kromer
    • 1
  • C. Langhammer
    • 1
  • C. Geibel
    • 1
  • F. Steglich
    • 1
    • 2
  • J. S. Kim
    • 3
  • G. R. Stewart
    • 3
    • 4
  1. 1.Max-Planck-Institut für Chemische Physik fester StoffeDresdenGermany
  2. 2.lnstitut für FestkörperphysikDarmstadtGermany
  3. 3.Department of PhysicsUniversity of FloridaGainesvilleUSA
  4. 4.lnstitut für PhysikUniversität AugsburgAugsburgGermany

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