Heavy-Fermion Systems

  • Peter Fulde
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 100)

Abstract

Investigations of heavy-fermion systems or metals with heavy electrons have developed into a new branch of metal physics. For recent theoretical and experimental reviews see, e.g., [13.1–5] and [13.6–8], respectively. In all cases those systems contain either Ce, Yb, U, or Np as one of their constituents, i.e., there are always 4for 5felectrons involved. Characteristic examples are: CeAl3, CeCu2Si2, CeRu2Si2, CeCu6, CeB6, YbAl3, YbCu2Si2, UBe1 3, UPt3, UCd11 U2Zn17, and NpBe1 3. Below a characteristic temperature T*, heavy-fermion systems show Fermi-liquid behavior with huge effective masses m* of the quasiparticles. In fact, m* may be several hundred times the free electron mass. Consequently, the low-temperature specific heat C = γT has an enormously large γ coefficient:γ is of order of 1 J mol−1 K−2, rather than 1 mJ mol−1 K2 as in sodium metal. The Pauli paramagnetic susceptibility is similarly enhanced in this temperature range. As the temperature increases to values above T*, the quasiparticles lose their heavy masses. The specific heat levels off as indicated in Fig. 13.1, and the susceptibility changes from a Pauli to a Curie-like behavior. With increasing temperature the Ce and U ions behave more and more like ions with well-localized f electrons.

Keywords

Entropy Anisotropy Attenuation Compressibility Alphen 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Chapter 13

  1. 13.1
    G. Czycholl: Phys. Rep. 143, 277 (1986)ADSCrossRefGoogle Scholar
  2. 13.2
    P.A. Lee, T.M. Rice, J.M. Serene, LJ. Sham, J.W. Wilkins: Comments Condensed Matter Phys. 12, 99 (1986)Google Scholar
  3. 13.3
    P. Fulde, J. Keller, G. Zwicknagl: In Solid State Physics, Vol. 41, ed. by H. Ehrenreich, D. Turnbull (Academic, San Diego 1988) p. 1Google Scholar
  4. 13.4
    P. Schlottmann: Phys. Rep. 181, 1 (1989)ADSCrossRefGoogle Scholar
  5. 13.5
    G. Zwicknagl: Adv. Phys. 41, 203 (1992)ADSCrossRefGoogle Scholar
  6. 13.6
    G.R. Stewart: Rev. Mod. Phys. 56, 755 (1984)ADSCrossRefGoogle Scholar
  7. 13.7
    H.R. Ott: Prog. Low Temp. Phys. 11, 215 (1987)CrossRefGoogle Scholar
  8. 13.8
    N. Grewe, F. Steglich: In Handbook on the Physics and Chemistry of Rare Earths, Vol. 14, ed. by K.A. Gschneidner, Jr., L. Eyring (North-Holland, Amsterdam 1991)Google Scholar
  9. 13.9
    P.H.P. Reinders, M. Springford, P.T. Coleridge, R. Boulet, D. Ravot: Phys. Rev. Lett. 57,1631 (1986)ADSCrossRefGoogle Scholar
  10. 13.10
    L. Taillefer, G.G. Lonzarich: Phys. Rev. Lett. 60, 1570 (1988)ADSCrossRefGoogle Scholar
  11. 13.11
    G. Zwicknagl: J. Magn. Magn. Mater. 76&77, 16 (1988)ADSCrossRefGoogle Scholar
  12. 13.12
    F. Steglich, J. Aarts, CD. Bredl, W. Lieke, D. Meschede, W. Franz, H. Schäfer: Phys. Rev. Lett. 43, 1892 (1979)ADSCrossRefGoogle Scholar
  13. 13.13
    G Kittel: Quantum Theory of Solids (Wiley, New York 1963)Google Scholar
  14. 13.14
    E. Runge: Ph.D. Thesis, Technische Hochschule Darmstadt (1989)Google Scholar
  15. 13.15
    G. Zwicknagl, E. Runge, N.E. Christensen: Physica B 163, 97 (1990)ADSCrossRefGoogle Scholar
  16. 13.16
    G.G. Lonzarich: J. Magn. Magn. Mater. 76&77, 1 (1988)ADSCrossRefGoogle Scholar
  17. 13.17
    N. Grewe, H. Keiter: Phys. Rev. B 24, 4420 (1981)ADSGoogle Scholar
  18. 13.18
    C. Lacroix, M. Cyrot: Phys. Rev. B 20, 1969 (1979)ADSGoogle Scholar
  19. 13.19
    N.E. Bickers: Rev Mod. Phys. 59, 845 (1987)ADSCrossRefGoogle Scholar
  20. 13.20
    N. Read, D.N. Newns: J. Phys. C 16, 3273 (1983)ADSGoogle Scholar
  21. 13.21
    P. Coleman: Phys. Rev. B 29, 3035 (1984)ADSGoogle Scholar
  22. 13.22
    N.E. Bickers, D.L. Cox, J.W. Wilkins: Phys. Rev. B 36, 2036 (1987)ADSGoogle Scholar
  23. 13.23
    F.C. Zhang, T.K. Lee: Phys. Rev. B 28, 33 (1983)ADSGoogle Scholar
  24. 13.24
    G. Zwicknagl, V. Zevin, P. Fulde: Z. Phys. B 79, 365 (1990)ADSCrossRefGoogle Scholar
  25. 13.25
    E. Müller-Hartmann: Z. Phys. B 57, 281 (1984)ADSCrossRefGoogle Scholar
  26. 13.26
    T.M. Rice, K. Ueda: Phys. Rev. Lett. 55, 995, 2093 (E) (1985)ADSCrossRefGoogle Scholar
  27. 13.27
    P. Fazekas: J. Magn. Magn. Mater. 63&64, 545 (1987)ADSCrossRefGoogle Scholar
  28. 13.28
    D. Rainer: Winter Meet. Low Temp. Phys. 3rd. Hacienda Cocyoc (1982)Google Scholar
  29. 13.29
    P. Thalmeier, B. Lüthi: In Handbook on the Physics and Chemistry of Rare Earths, Vol. 14, ed. by K.A. Gschneidner, Jr., L. Eyring (North-Holland, Amsterdam 1991)Google Scholar
  30. 13.30
    P. Fulde: In Handbook on the Physics and Chemistry of Rare Earths, Vol. 2, ed. by K.A. Gschneidner, Jr., L. Eyring (North-Holland, Amsterdam 1978) p. 295Google Scholar
  31. 13.31
    J. Keller, R. Bulla, T. Höhn, K.W. Becker: Phys. Rev. B 41, 1878 (1990)ADSGoogle Scholar
  32. 13.32
    A.K. Albessard, T. Ebihara, I. Umehara, K. Satoh, Y. Onuki, H. Aoki, S. Uji, T. Shimizu: Physica B (to appear)Google Scholar

Copyright information

© Springer -Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • Peter Fulde
    • 1
  1. 1.MPI für FestkörperforschungStuttgart 80Deutschland

Personalised recommendations